fix(security): escape brand tokens, block tracker redirects, trim logo diagnostic (GHSA-j347, mw76, 29vm) (#961)

* fix(security): escape brand tokens, block tracker redirects, trim logo diagnostic (GHSA-j347, mw76, 29vm)

GHSA-j347 — buildCachedPayload sanitizes the operator's HTML and THEN runs
applyBrandTokens over the result with a plain String.replace, so any markup in
a token value reached the public origin unfiltered. The default templates
interpolate tokens into text AND into quoted attributes
(<img src="{{brand_logo_url}}" alt="{{company_name}} logo">,
href="mailto:{{support_email}}"), so a value could close the attribute and
inject. Token values are now HTML-escaped on substitution, mirroring
galleryOgService's escapeHtml. sanitizeBrandUrl's case-sensitive literal
'javascript:' check (which 'JavaScript:' walked straight past) is replaced by
an http/https scheme allowlist; relative logo paths are unaffected.

Writer is settings.edit (super_admin only) and the CSP blocks inline script,
so this is defence-in-depth — but sanitize-then-substitute is a real ordering
bug regardless.

GHSA-mw76 — the SSRF decline STANDS: self-hosted operators legitimately point
analytics at private addresses, so connection-time IP blocking would break real
deployments. Fixed only the narrow leak: undici strips
Authorization/Cookie/Proxy-Authorization/Host across a cross-origin redirect,
but umamiAdapter sends a CUSTOM x-umami-api-key header, which would be replayed
verbatim to the redirect target. Both adapters now use redirect: 'error'.

GHSA-29vm — the logo diagnostic echoed absolute storage roots, process.cwd()
and absolute candidate paths. It now reports candidates relative to
<STORAGE>/<CWD_STORAGE>, which answers the same 'which candidate existed'
question. It also still advertised the raw-absolute candidate that GHSA-c7x5
removed from resolveLogoFile, so it was misreporting what the resolver tries —
aligned with the real candidate list.

publicSiteService.test.js expectation updated: an '&' in a company name is now
emitted as '&amp;'. Renders identically; the raw payload string differs.

* fix(security): codex round 2 — stop the remaining logo-path disclosure, mirror the resolver (GHSA-29vm)

- sources[].value was still echoed verbatim. branding_logo_path is stored
  ABSOLUTE by multer, so relativising only resolvedTo and the candidate paths
  left the filesystem layout going out anyway. It is now relativised too.
- Round 1 dropped the raw-absolute candidate on the grounds that GHSA-c7x5
  removed it from resolveLogoFile — but the c7x5 follow-up RE-ADDED it (kept,
  subject to the containment filter, so a legitimate multer path still
  resolves). The diagnostic therefore reported every candidate as missing for
  a contained absolute logo while resolvedTo named the file. It now mirrors the
  resolver, containment filter included.

One deliberate cosmetic divergence, commented in place: for an absolute value
the resolver also tries path.join(root, value-minus-leading-slash), which can
never exist and would re-embed the absolute path this endpoint must stop
echoing. Omitted; every candidate that can actually match is still shown.

* fix(security): codex round 3 — mirror the resolver for root-relative logo paths (GHSA-29vm)

The logo diagnostic skipped the `<STORAGE>/<value>` candidates whenever
path.isAbsolute(value) was true. That test cannot distinguish a multer disk
path from a root-relative URL such as `/custom/logo.png`, and for the URL form
resolveLogoFile.generateCandidates() does try `<STORAGE>/custom/logo.png` and
can resolve it — so the endpoint reported "no source candidate exists" about a
logo that renders fine, and collapsed the configured value to its basename.

The stripped joins are now built unconditionally, exactly as the resolver does.
Disclosure stays closed: every candidate still passes the containment filter and
redact() rewrites survivors to `<STORAGE>/…`, never an absolute host path.

Claude-Session: https://claude.ai/code/session_01F211U4dDbEj4zXiyKbi9me

* fix(security): gate the logo stripped-joins on containment, not isAbsolute (GHSA-29vm)

The previous commit dropped the isAbsolute() gate entirely and regressed
logoDiagnostic's own disclosure assertion: for a genuine multer disk path,
path.join(root, value-minus-leading-slash) yields
`<STORAGE>/tmp/…/storage/custom/logo.png`, and redact() only rewrites the
LEADING root — so the inner absolute path went straight back into the payload.

The right discriminator is not "is this absolute" (which cannot separate a disk
path from a root-relative URL) but "does the value already resolve inside a
storage root". If it does, it is a real disk path, the raw candidate already
covers it, and the stripped join is the double-prefixed junk that can never
exist. If it does not — the `/custom/logo.png` URL form — the stripped join is
exactly what resolveLogoFile resolves, and is shown.

Covered by a new case asserting both halves: the candidate appears for the URL
form, and the payload still contains neither the storage root nor cwd.

Claude-Session: https://claude.ai/code/session_01F211U4dDbEj4zXiyKbi9me

---------

Co-authored-by: Paul Nothaft <paul@MacStudio-von-Paul.local>
This commit is contained in:
Paul Nothaft
2026-08-02 21:17:17 +02:00
committed by GitHub
parent e2ce95ee48
commit 164129b8f5
7 changed files with 331 additions and 16 deletions
@@ -0,0 +1,123 @@
/**
* Logo diagnostic must not leak the filesystem layout, and must mirror what
* resolveLogoFile actually tries (GHSA-29vm, codex round 2).
*
* Round 1 relativised `resolvedTo` and the candidate paths but still echoed
* `sources[].value` verbatim — and branding_logo_path is stored ABSOLUTE by
* multer, so the layout went out anyway. It also dropped the raw-absolute
* candidate, which the resolver retains (subject to containment), making the
* diagnostic report every candidate as missing for a legitimately contained
* absolute logo while `resolvedTo` named the file.
*/
const path = require('path');
const fs = require('fs');
const os = require('os');
process.env.NODE_ENV = 'test';
process.env.TEST_DATABASE_PATH = path.join(
fs.mkdtempSync(path.join(os.tmpdir(), 'picpeak-logodiag-')), 'db.sqlite',
);
process.env.JWT_SECRET = process.env.JWT_SECRET || 'logodiag-test-secret';
const request = require('supertest');
const express = require('express');
const bcrypt = require('bcrypt');
const jwt = require('jsonwebtoken');
const { bootCrmDb, seedMinimal } = require('../integration/helpers/crmDb');
describe('logo diagnostic disclosure (GHSA-29vm)', () => {
let db; let cleanup; let app; let token;
// bootCrmDb() sets STORAGE_PATH itself, so resolve these AFTER it runs.
let STORAGE; let logoDir; let logoPath;
beforeAll(async () => {
({ db, cleanup } = await bootCrmDb());
await seedMinimal(db);
// A legitimately contained absolute logo in a NON-standard storage subdir.
STORAGE = process.env.STORAGE_PATH;
logoDir = path.join(STORAGE, 'custom');
logoPath = path.join(logoDir, 'logo.png');
fs.mkdirSync(logoDir, { recursive: true });
fs.writeFileSync(logoPath, 'png');
const setting = { setting_key: 'branding_logo_path', setting_value: JSON.stringify(logoPath), setting_type: 'branding' };
const existing = await db('app_settings').where({ setting_key: 'branding_logo_path' }).first();
if (existing) await db('app_settings').where({ setting_key: 'branding_logo_path' }).update(setting);
else await db('app_settings').insert(setting);
const role = await db('roles').where({ name: 'super_admin' }).first();
const r = await db('admin_users').insert({
username: 'diag-admin', email: 'diag@example.com',
password_hash: await bcrypt.hash('Passw0rd!', 4),
role_id: role.id, is_active: 1,
created_at: new Date(), updated_at: new Date(),
}).returning('id');
const id = r[0]?.id ?? r[0];
token = jwt.sign(
{ id, username: 'diag-admin', type: 'admin', role: 'super_admin', loginTime: Date.now() },
process.env.JWT_SECRET, { expiresIn: '1h', issuer: 'picpeak-auth' },
);
app = express();
app.use(express.json());
app.use('/api/admin/business-profile', require('../../src/routes/adminBusinessProfile'));
}, 120000);
afterAll(async () => { if (cleanup) await cleanup(); });
it('does not leak absolute paths, cwd or storage root anywhere in the payload', async () => {
const res = await request(app)
.get('/api/admin/business-profile/logo-diagnostic')
.set('Authorization', `Bearer ${token}`);
expect(res.status).toBe(200);
const body = JSON.stringify(res.body);
expect(body).not.toContain(STORAGE);
expect(body).not.toContain(process.cwd());
expect(res.body.storageRoot).toBeUndefined();
expect(res.body.cwd).toBeUndefined();
});
it('still finds a contained absolute logo outside the standard subdirs', async () => {
const res = await request(app)
.get('/api/admin/business-profile/logo-diagnostic')
.set('Authorization', `Bearer ${token}`);
const source = res.body.sources.find((s) => s.label === 'app_settings.branding_logo_path');
expect(source).toBeTruthy();
// The resolver keeps the contained absolute candidate, so the diagnostic
// must show it existing rather than reporting everything missing.
expect(source.candidates.some((c) => c.exists)).toBe(true);
expect(res.body.resolvedTo).toMatch(/^<STORAGE>\//);
});
it('shows the <STORAGE>/<value> candidate for a ROOT-RELATIVE logo URL (round 3)', async () => {
// `/custom/logo.png` is a URL, not a disk path, but path.isAbsolute() says
// true for both. Gating the stripped joins on isAbsolute() therefore hid
// `<STORAGE>/custom/logo.png` — a candidate resolveLogoFile does try and
// can resolve — so the diagnostic claimed nothing existed for a logo that
// renders fine, and collapsed the configured value to its basename.
await db('app_settings').where({ setting_key: 'branding_logo_path' })
.update({ setting_value: JSON.stringify('/custom/logo.png') });
const res = await request(app)
.get('/api/admin/business-profile/logo-diagnostic')
.set('Authorization', `Bearer ${token}`);
expect(res.status).toBe(200);
const source = res.body.sources.find((s) => s.label === 'app_settings.branding_logo_path');
expect(source.candidates.some((c) => c.path === '<STORAGE>/custom/logo.png' && c.exists)).toBe(true);
// …and the disclosure guarantee still holds for this shape.
const body = JSON.stringify(res.body);
expect(body).not.toContain(STORAGE);
expect(body).not.toContain(process.cwd());
await db('app_settings').where({ setting_key: 'branding_logo_path' })
.update({ setting_value: JSON.stringify(logoPath) });
});
});
@@ -0,0 +1,91 @@
/**
* Brand-token substitution must not reintroduce markup after sanitization
* (GHSA-j347).
*
* buildCachedPayload sanitizes the operator's HTML and THEN calls
* applyBrandTokens on the result, which did a plain `String.replace` with no
* escaping. The default templates interpolate tokens into text and into quoted
* attributes (`<img src="{{brand_logo_url}}" alt="{{company_name}} logo">`,
* `href="mailto:{{support_email}}"`), so a token value could close the
* attribute and inject markup into the public origin.
*
* The writer is settings.edit (super_admin only) and the CSP blocks inline
* script, so this is defence-in-depth rather than a live RCE — but the
* sanitize-then-substitute ordering is a real bug either way.
*/
const path = require('path');
const fs = require('fs');
const os = require('os');
process.env.NODE_ENV = 'test';
process.env.TEST_DATABASE_PATH = path.join(
fs.mkdtempSync(path.join(os.tmpdir(), 'picpeak-brandtok-')), 'db.sqlite',
);
process.env.JWT_SECRET = process.env.JWT_SECRET || 'brandtok-test-secret';
const { _internal } = require('../../src/services/publicSiteService');
// applyBrandTokens / sanitizeBrandUrl are module-private; the service exports
// them under _internal for testing (see publicSiteService module.exports).
const { applyBrandTokens, sanitizeBrandUrl } = _internal || {};
const maybe = applyBrandTokens ? describe : describe.skip;
maybe('applyBrandTokens escaping (GHSA-j347)', () => {
it('escapes markup in a text-position token', () => {
const out = applyBrandTokens('<p>{{company_name}}</p>', {
companyName: '<script>alert(1)</script>',
});
expect(out).not.toContain('<script>');
expect(out).toContain('&lt;script&gt;');
});
it('escapes a quote that would break out of an attribute', () => {
const out = applyBrandTokens(
'<img src="/x.png" alt="{{company_name}} logo">',
{ companyName: '" onerror="alert(1)' },
);
// The injected quotes must be entity-encoded, so the payload stays INSIDE
// the alt value as text instead of terminating it and forming a real
// onerror attribute. (`onerror=` still appears as literal characters —
// that is inert; what matters is that no raw `"` closed the attribute.)
expect(out).not.toContain('" onerror="');
expect(out).toContain('&quot; onerror=&quot;');
});
it('escapes the logo url token used inside src="..."', () => {
const out = applyBrandTokens('<img src="{{brand_logo_url}}">', {
logoUrl: '" onerror="alert(1)',
});
expect(out).not.toContain('" onerror="');
expect(out).toContain('&quot;');
});
it('leaves ordinary values readable', () => {
const out = applyBrandTokens('<p>{{company_name}}</p>', { companyName: 'Acme Photos' });
expect(out).toContain('Acme Photos');
});
});
const maybeUrl = sanitizeBrandUrl ? describe : describe.skip;
maybeUrl('sanitizeBrandUrl scheme allowlist (GHSA-j347)', () => {
it('rejects javascript: regardless of case', () => {
expect(sanitizeBrandUrl('javascript:alert(1)')).toBeNull();
// The old check was a case-sensitive startsWith and missed these.
expect(sanitizeBrandUrl('JavaScript:alert(1)')).toBeNull();
expect(sanitizeBrandUrl(' JAVASCRIPT:alert(1)')).toBeNull();
});
it('rejects other non-http schemes', () => {
expect(sanitizeBrandUrl('data:text/html;base64,PHN2Zz4=')).toBeNull();
expect(sanitizeBrandUrl('vbscript:msgbox(1)')).toBeNull();
});
it('keeps http(s) and relative logo paths working', () => {
expect(sanitizeBrandUrl('https://cdn.example.com/logo.png'))
.toBe('https://cdn.example.com/logo.png');
expect(sanitizeBrandUrl('/uploads/logos/logo.png')).toBe('/uploads/logos/logo.png');
});
});
@@ -52,7 +52,11 @@ describe('publicSiteService', () => {
const payload = await getPublicSitePayload({ bypassCache: true });
expect(payload.enabled).toBe(true);
expect(payload.html).toContain('<h1>Willow & Pine Studio</h1>');
// Brand tokens are HTML-escaped on substitution now (GHSA-j347), so a bare
// `&` in the company name is emitted as the `&amp;` entity. That renders
// identically in a browser — it is the correctly-encoded form — but the raw
// payload string differs from the pre-fix output.
expect(payload.html).toContain('<h1>Willow &amp; Pine Studio</h1>');
expect(payload.html).not.toContain('<script');
expect(payload.baseCss.length).toBeGreaterThan(0);
expect(payload.branding.companyName).toBe('Willow & Pine Studio');
+63 -12
View File
@@ -249,33 +249,84 @@ router.get(
const brandingLogoUrl = await getAppSetting('branding_logo_url');
const resolved = await resolveLogoFile(profile);
// GHSA-29vm: report candidates RELATIVE to the storage roots rather than
// echoing absolute container paths and process.cwd(). This endpoint exists
// to answer "which candidate did/didn't exist", which relative paths answer
// just as well without handing out the filesystem layout.
const cwdStorage = path.join(process.cwd(), 'storage');
const relativise = (p) => {
for (const [name, root] of [['STORAGE', storageRoot], ['CWD_STORAGE', cwdStorage]]) {
const rel = path.relative(root, p);
if (rel && !rel.startsWith('..') && !path.isAbsolute(rel)) {
return `<${name}>/${rel.split(path.sep).join('/')}`;
}
}
return path.basename(p);
};
const inspect = (label, raw) => {
const value = (raw || '').toString().trim();
if (!value) return { label, value: null, candidates: [] };
const stripped = value.replace(/^\/+/, '');
const baseName = path.basename(value);
// Mirrors resolveLogoFile's candidate list EXACTLY. It keeps the raw
// absolute value as a candidate (multer stores branding_logo_path
// absolute) and lets the storage-root containment filter reject it when
// it points outside — so the diagnostic must include it too, or a
// legitimately-contained absolute logo shows every candidate as missing
// while resolvedTo names the file.
// The stripped joins (`<ROOT>/<value-minus-leading-slash>`) are gated on
// containment, NOT on path.isAbsolute(). isAbsolute() cannot tell a
// multer disk path from a root-relative URL like `/custom/logo.png`, and
// for the URL form `<STORAGE>/custom/logo.png` is a file the resolver
// genuinely returns — skipping it made this endpoint report "no source
// candidate exists" about a logo that renders fine.
//
// The gate is instead: does the raw value ALREADY resolve inside a
// storage root? If so it is a real disk path, the raw candidate below
// covers it, and the stripped join would only produce a double-prefixed
// path that can never exist while re-embedding the absolute path
// GHSA-29vm exists to stop echoing (redact() strips only the leading
// root, so the inner one would survive).
const valueInsideRoot = path.isAbsolute(value) && [
path.resolve(storageRoot), path.resolve(cwdStorage),
].some((root) => {
const r = path.resolve(value);
return r === root || r.startsWith(root + path.sep);
});
const strippedJoins = valueInsideRoot
? []
: [path.join(storageRoot, stripped), path.join(cwdStorage, stripped)];
const candidates = [
path.isAbsolute(value) ? value : null,
path.join(storageRoot, stripped),
...(path.isAbsolute(value) ? [value] : []),
...strippedJoins,
path.join(storageRoot, 'uploads', 'logos', baseName),
path.join(storageRoot, 'branding', baseName),
path.join(process.cwd(), 'storage', stripped),
path.join(process.cwd(), 'storage', 'uploads', 'logos', baseName),
path.join(process.cwd(), 'storage', 'branding', baseName),
].filter(Boolean);
path.join(cwdStorage, 'uploads', 'logos', baseName),
path.join(cwdStorage, 'branding', baseName),
];
const roots = [path.resolve(storageRoot), path.resolve(cwdStorage)];
const contained = candidates.filter((c) => {
const r = path.resolve(c);
return roots.some((root) => r === root || r.startsWith(root + path.sep));
});
return {
label, value,
candidates: [...new Set(candidates)].map((p) => ({
path: p,
label,
// GHSA-29vm: branding_logo_path is stored absolute by multer, so
// echoing it back handed out the filesystem layout just as the
// candidate paths did. Relativise it the same way.
value: path.isAbsolute(value) ? relativise(value) : value,
candidates: [...new Set(contained)].map((p) => ({
path: relativise(p),
exists: (() => { try { return fs.existsSync(p) && fs.statSync(p).isFile(); } catch { return false; } })(),
})),
};
};
return successResponse(res, {
storageRoot,
cwd: process.cwd(),
resolvedTo: resolved,
// Absolute storageRoot / cwd deliberately omitted (GHSA-29vm); the
// candidate paths below are shown relative to <STORAGE>/<CWD_STORAGE>.
resolvedTo: resolved ? relativise(resolved) : null,
sources: [
inspect('business_profile.logo_path', profile?.logo_path),
inspect('app_settings.branding_logo_path', brandingDiskPath),
+35 -3
View File
@@ -63,13 +63,40 @@ function sanitizeBrandUrl(url) {
}
const trimmed = url.trim();
if (trimmed.startsWith('javascript:')) {
// GHSA-j347: the old check was a case-sensitive literal `javascript:`, which
// `JavaScript:` walks straight past. Allowlist the schemes a logo URL can
// legitimately use instead of blocklisting one spelling. Relative paths (the
// common case — /uploads/logos/x.png) carry no scheme and are unaffected.
const scheme = trimmed.match(/^\s*([a-z][a-z0-9+.-]*)\s*:/i);
if (scheme && !['http', 'https'].includes(scheme[1].toLowerCase())) {
return null;
}
return trimmed;
}
/**
* HTML-escape a brand token value (GHSA-j347).
*
* Brand tokens are substituted AFTER sanitize-html runs, so markup in a token
* value reaches the public page unfiltered. The default templates interpolate
* tokens into text AND into quoted attributes
* (`<img src="{{brand_logo_url}}" alt="{{company_name}} logo">`,
* `href="mailto:{{support_email}}"`), so escaping the five HTML-significant
* characters is correct in both positions.
*
* Mirrors galleryOgService's escapeHtml, which already handles this correctly.
*/
function escapeTokenValue(value) {
if (value === null || value === undefined) return '';
return String(value)
.replace(/&/g, '&amp;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&#039;');
}
async function fetchBrandingContext() {
const rows = await db('app_settings')
.whereIn('setting_key', [
@@ -265,13 +292,18 @@ function applyBrandTokens(html, branding) {
brand_text_hex: branding.colors?.text || '#0f172a'
};
// Escape on substitution (GHSA-j347) — this runs AFTER sanitizeHtmlPayload,
// so an unescaped value would reintroduce raw markup into the public origin.
return html.replace(/\{\{\s*(company_name|company_tagline|support_email|brand_logo_url|brand_primary_hex|brand_accent_hex|brand_background_hex|brand_text_hex)\s*\}\}/gi,
(_, key) => tokens[key] || '');
(_, key) => escapeTokenValue(tokens[key] || ''));
}
module.exports = {
getPublicSitePayload,
clearPublicSiteCache,
getDefaultPublicSitePayload,
getRawPublicSiteSettings
getRawPublicSiteSettings,
// Exposed for tests only — the token-escaping and URL-scheme rules
// (GHSA-j347) are worth pinning directly rather than through the cache.
_internal: { applyBrandTokens, sanitizeBrandUrl }
};
@@ -59,6 +59,13 @@ function buildAdapter({ baseUrl, websiteId, apiKey }) {
Authorization: `Bearer ${apiKey}`,
Accept: 'application/json',
},
// Never follow a redirect (GHSA-mw76). undici only strips
// Authorization/Cookie/Proxy-Authorization/Host when a redirect
// crosses origins — a custom key header would be replayed verbatim to
// whatever host the tracker redirects to. Self-hosted trackers on
// private addresses keep working; only a proxy that 301s is affected,
// and that surfaces as a clear logged error rather than a silent leak.
redirect: 'error',
signal: controller.signal,
});
} catch (err) {
@@ -41,6 +41,13 @@ function buildAdapter({ baseUrl, websiteId, apiKey }) {
'x-umami-api-key': apiKey,
Accept: 'application/json',
},
// Never follow a redirect (GHSA-mw76). undici only strips
// Authorization/Cookie/Proxy-Authorization/Host when a redirect
// crosses origins — a custom key header would be replayed verbatim to
// whatever host the tracker redirects to. Self-hosted trackers on
// private addresses keep working; only a proxy that 301s is affected,
// and that surfaces as a clear logged error rather than a silent leak.
redirect: 'error',
signal: controller.signal,
});
} catch (err) {