ApostropheCMS slug check reveals private and admin-only content slugs
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.
Summary
ApostropheCMS, an open-source Node.js content management system, is affected before 4.34.0. The slugTaken API endpoint checks slugs across all document types and visibility levels without a permission filter, which exposes sensitive information (CWE-200). Any logged-in user, including editors, can learn whether slugs of private pages, drafts and archived content are in use.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, 'POST /api/v1/@apostrophecms/doc/slugTaken' with body { "slug": "target-slug" } returns a boolean indicating whether a slug is in use across all document types and visibility levels, with no permission or type filter. Any logged-in user (including editors) can enumerate the slug space of private pages, drafts, and archived content. This issue is fixed in version 4.34.0.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| apostrophecms | apostrophe | before 4.34.0 | 4.34.0 | Patch available | CNA |
| — | apostrophe (npm) | before 4.34.0 | 4.34.0 | Patch available | GHSA-f66c-mpj2-3r8h |
- apostrophe Vendorapostrophecms Affected before 4.34.0 Fixed in 4.34.0 Patch available CNA
- apostrophe (npm) Vendor— Affected before 4.34.0 Fixed in 4.34.0 Patch available GHSA-f66c-mpj2-3r8h
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:* | — | — | apostrophecms |
- cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:* Versions — — ·apostrophecms
Remediation
Update the apostrophe npm package to version 4.34.0, which fixes this issue.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
- Fix · CNA apostrophe (apostrophecms) Fixed in 4.34.0
- Fix · GHSA-f66c-mpj2-3r8h apostrophe (npm) Fixed in 4.34.0 Advisory →
Timeline
- 2026-10-20 Threatist record created from CVE-2026-112952
- 2026-10-21 CISA SSVC decision points changed
- 2026-10-21 Alias added: GHSA-f66c-mpj2-3r8h
- 2026-10-21 Fix available: npm/[email protected] · GHSA-f66c-mpj2-3r8h
- 2026-10-21 CVSS score added · GHSA-f66c-mpj2-3r8h
- 2026-10-21 Weakness changed · GHSA-f66c-mpj2-3r8h
- 2026-10-21 6 new references · GHSA-f66c-mpj2-3r8h
References
Other 5
- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-f66c-mpj2-3r8h
- https://github.com/apostrophecms/apostrophe/commit/06e4b377f3c360f9e89c32dccd7e505ad5ddf498
- https://github.com/apostrophecms/apostrophe/commit/40b989b1a9dd23d30029b8ce7668634265cfe5ea
- https://github.com/apostrophecms/apostrophe/releases/tag/[email protected]
- https://github.com/apostrophecms/apostrophe
More apostrophecms vulnerabilities
- TI-2026-25223 ApostropheCMS has Arbitrary File Write (Zip Slip / Path Traversal) in Import-Export Gzip Extraction CVSS 3.1CRITICAL 10.0
- TI-2026-32848 Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html` CVSS 3.1CRITICAL 9.3
- TI-2026-38664 @apostrophecms/seo Vulnerable to Stored XSS via Unsanitized Google Analytics / GTM ID Injected into Script Tag CVSS 3.1HIGH 8.7
- TI-2026-27673 ApostropheCMS: Stored XSS in SEO Fields Leads to Authenticated API Data Exposure in ApostropheCMS CVSS 3.1HIGH 8.7
- TI-2026-76992 Unauthenticated resource exhaustion via ApostropheCMS import routes CVSS 3.1HIGH 7.5
- TI-2026-76974 ApostropheCMS leaves rejected CSV uploads in temporary directory CVSS 3.1HIGH 7.5
Sources
- CVE-2026-112952 · CVE Program
- CVE-2026-112952 · NVD
- FIRST EPSS
- GHSA-f66c-mpj2-3r8h · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences