CVE-2026-72604: Intelliants Subrion CMS path traversal in file deletion

CVE-2026-72604 · Severity: medium · CVSS 6.5 · Published 2026-08-11

Subrion CMS is a popular open-source PHP content management system used to build and manage websites. A vulnerability allows authenticated administrators to delete arbitrary files from the server by exploiting unsanitized file paths in the admin panel. An attacker with admin credentials can delete critical system files, causing service outages or creating opportunities for further attacks on the server.

Technologies: Intelliants Subrion CMS. Vendors: Intelliants.

Quick answers

Is CVE-2026-72604 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-72604 being exploited in the wild.
How severe is CVE-2026-72604?
Medium severity, with a CVSS score of 6.5, published 11 August 2026.
Which products and versions are affected?
Intelliants Subrion CMS through 4.2.1.
Is there a fix for CVE-2026-72604?
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-2026-72604 attacked?
It is attacked over the network.
Am I affected by CVE-2026-72604?
Check whether you run Intelliants Subrion CMS 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

This is a path traversal vulnerability in the file deletion endpoint of Subrion CMS through version 4.2.1. The vulnerable code passes user-supplied file paths directly to PHP's unlink() function without proper sanitization or path canonicalization, allowing directory traversal sequences (e.g., ../../../) to reach files outside the intended directory. The attack requires valid administrator credentials and access to the admin panel file deletion feature. An authenticated admin can delete arbitrary files on the filesystem, including configuration files, system files, or application code outside the web root, leading to denial of service or privilege escalation opportunities. A patch or version update addressing path validation is recommended.

Affected products

  • Intelliants Subrion CMS through 4.2.1

Timeline

  • 2026-08-11: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.