Authorization bypass in ApostropheCMS reveals restricted document IDs
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- 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-862.
Summary
The apostrophe npm package of ApostropheCMS, an open-source Node.js content management system, is affected before 4.33.0. A missing authorization check (CWE-862) in the exist-in-locale API returns localized document identifiers without applying document-level view or edit criteria. An authenticated low-privilege user can determine whether restricted documents exist in a specified locale and mode, including draft mode.
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 4.33.0, ApostropheCMS’s exist-in-locale API allows an authenticated low-privilege user to determine whether restricted documents exist in a specified locale and mode, including draft mode. The endpoint returns localized document identifiers without applying document-level view or edit authorization criteria. This issue is fixed in version 4.33.0.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 4.33.0 | 4.33.0 | Patch available | CNA |
| — | apostrophe (npm) | before 4.33.0 | 4.33.0 | Patch available | GHSA-vmxh-77cw-65j7 |
- apostrophe Vendorapostrophecms Affected before 4.33.0 Fixed in 4.33.0 Patch available CNA
- apostrophe (npm) Vendor— Affected before 4.33.0 Fixed in 4.33.0 Patch available GHSA-vmxh-77cw-65j7
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
Upgrade the apostrophe npm package to version 4.33.0, which fixes this issue.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
- Fix · CNA apostrophe (apostrophecms) Fixed in 4.33.0
- Fix · GHSA-vmxh-77cw-65j7 apostrophe (npm) Fixed in 4.33.0 Advisory →
Timeline
- 2026-10-20 Threatist record created from CVE-2026-113660
- 2026-10-20 CISA SSVC decision points changed
- 2026-10-20 Priority changed: LOW → MEDIUM
- 2026-10-21 Alias added: GHSA-vmxh-77cw-65j7
- 2026-10-21 Fix available: npm/[email protected] · GHSA-vmxh-77cw-65j7
- 2026-10-21 CVSS score added · GHSA-vmxh-77cw-65j7
- 2026-10-21 Weakness changed · GHSA-vmxh-77cw-65j7
- 2026-10-21 5 new references · GHSA-vmxh-77cw-65j7
References
Other 5
- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmxh-77cw-65j7
- https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce
- https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350
- 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-2026-113660 · CVE Program
- CVE-2026-113660 · NVD
- FIRST EPSS
- GHSA-vmxh-77cw-65j7 · 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