# CVE-2026-93767: Tainacan plugin for WordPress directory traversal in guid parameter

Source: https://junglewise.ai/threats/cve-2026-93767-the-tainacan-plugin-for-wordpress-is-vulnerable-to-directory  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-16. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-93767 · Severity: medium · CVSS 6.5 · Published 2026-10-16

The Tainacan plugin is a WordPress plugin used to manage digital collections and archives. A directory traversal vulnerability in the guid parameter allows authenticated subscribers to read arbitrary files on the server, potentially exposing sensitive configuration files, database credentials, or private data. The vulnerability only occurs when the uploads/tainacan directory does not exist, making it a conditional but serious information disclosure risk.

Technologies: [Tainacan](https://junglewise.ai/threats/technologies/tainacan). Vendors: [Tainacan](https://junglewise.ai/threats/vendors/tainacan).

## Quick answers

**Is CVE-2026-93767 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-93767 being exploited in the wild.

**How severe is CVE-2026-93767?** Medium severity, with a CVSS score of 6.5, published 16 October 2026.

**Which products and versions are affected?** Tainacan up to and including 1.3.0.

**Is there a fix for CVE-2026-93767?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-93767 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-93767?** Check whether you run Tainacan at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The plugin fails to properly validate the 'guid' parameter in the REST API background processes controller, allowing path traversal. Authenticated attackers with subscriber-level access can exploit this to bypass path containment checks via the realpath() function, which returns false when the uploads/tainacan directory does not exist, collapsing the base path validation. This leads to arbitrary file read on the server filesystem.

## Affected products

- Tainacan Tainacan up to and including 1.3.0

## Timeline

- 2026-10-16: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-background-processes-controller.php](https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-background-processes-controller.php)
- [https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-background-processes-controller.php](https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-background-processes-controller.php)

## Related threats

- [Tainacan directory traversal in importer tmp_file parameter](https://junglewise.ai/threats/cve-2026-104743-the-tainacan-plugin-for-wordpress-is-vulnerable-to-directory)
- [Tainacan SQL injection in subscriber functionality](https://junglewise.ai/threats/cve-2026-95590-subscriber-sql-injection-in-tainacan-1-2-0-versions)
- [Tainacan WordPress plugin SQL injection in geoquery parameter](https://junglewise.ai/threats/cve-2026-6230-tainacan-wordpress-plugin-sql-injection-in-geoquery-parameter)
- [Tainacan SQL injection in WordPress plugin](https://junglewise.ai/threats/cve-2026-42740-tainacan-sql-injection-in-wordpress-plugin)