Predictable export filenames expose exports in ApostropheCMS
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.
Summary
ApostropheCMS's import-export module before 3.7.1 creates export archives with predictable filenames, which exposes sensitive information (CWE-200). An unauthenticated remote attacker can download another user's export from publicly readable export storage before the archive expires or is removed. A user with export permission must first create the archive, and sites with exports disabled or private upload storage are not exposed through this network path.
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 3.7.1 of the import-export module, predictable export archive filenames allow an unauthenticated requester to download another user's export from publicly readable export storage before the archive expires or is removed. A user with export permission must first create the archive, and sites with exports disabled, private upload storage, or authenticated upload delivery are not exposed through this network-download path. This issue is fixed in version 3.7.1.
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 4.34.0 | 4.34.0 | Patch available | CNA |
| apostrophecms | import-export | before 3.7.1 | 3.7.1 | Patch available | CNA |
| — | @apostrophecms/import-export (npm) | before 3.7.1 | 3.7.1 | Patch available | GHSA-5gc8-frw3-3vqm |
- apostrophe Vendorapostrophecms Affected before 4.34.0 Fixed in 4.34.0 Patch available CNA
- import-export Vendorapostrophecms Affected before 3.7.1 Fixed in 3.7.1 Patch available CNA
- @apostrophecms/import-export (npm) Vendor— Affected before 3.7.1 Fixed in 3.7.1 Patch available GHSA-5gc8-frw3-3vqm
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 @apostrophecms/import-export to version 3.7.1, which fixes this issue. The sources list no fixed version for apostrophe.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
- Fix · CNA apostrophe (apostrophecms) Fixed in 4.34.0
- Fix · CNA import-export (@apostrophecms) Fixed in 3.7.1
- Fix · GHSA-5gc8-frw3-3vqm @apostrophecms/import-export (npm) Fixed in 3.7.1 Advisory →
Timeline
- 2026-10-20 Threatist record created from CVE-2026-112953
- 2026-10-20 CISA SSVC decision points changed
- 2026-10-21 Alias added: GHSA-5gc8-frw3-3vqm
- 2026-10-21 Fix available: npm/@apostrophecms/[email protected] · GHSA-5gc8-frw3-3vqm
- 2026-10-21 CVSS score added · GHSA-5gc8-frw3-3vqm
- 2026-10-21 Weakness changed · GHSA-5gc8-frw3-3vqm
- 2026-10-21 6 new references · GHSA-5gc8-frw3-3vqm
References
Other 5
- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-5gc8-frw3-3vqm
- https://github.com/apostrophecms/apostrophe/commit/06e4b377f3c360f9e89c32dccd7e505ad5ddf498
- https://github.com/apostrophecms/apostrophe/commit/40b989b1a9dd23d30029b8ce7668634265cfe5ea
- https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/[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-2026-112953 · CVE Program
- CVE-2026-112953 · NVD
- FIRST EPSS
- GHSA-5gc8-frw3-3vqm · 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