CVE-2026-50869: Bludit directory traversal in api/plugin.php

CVE-2026-50869 · Severity: info · CVSS 7.2 · Published 2026-06-15

Bludit, a popular open-source content management system, contains a security flaw in its file upload system. An authorized administrator can bypass security restrictions to save files in unauthorized locations on the web server. This could allow an attacker to overwrite critical system configuration files, potentially leading to a complete takeover of the website or server.

Technologies: Bludit. Vendors: Bludit.

Quick answers

Is CVE-2026-50869 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-50869 being exploited in the wild.
How severe is CVE-2026-50869?
Informational severity, with a CVSS score of 7.2, published 15 June 2026.
Which products and versions are affected?
Bludit 3.19.0.
Is there a fix for CVE-2026-50869?
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-2026-50869 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-50869?
Check whether you run Bludit 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

A directory traversal vulnerability exists in the `uploadFile()` function within `bl-plugins/api/plugin.php` of Bludit v3.19.0. The application fails to sanitize the `filename` parameter from multipart form data, directly appending it to the upload path. An authenticated attacker with administrator privileges can provide a crafted filename containing path traversal sequences (e.g., `../../../../.htaccess`). While the application blocks some script extensions, it does not normalize path segments, enabling the placement of configuration files like `.htaccess` or `.user.ini` in sensitive directories. This can lead to arbitrary PHP code execution or filesystem integrity loss depending on the server configuration.

Affected products

  • Bludit Bludit 3.19.0

Timeline

  • 2026-06-13: disclosed: Initial discovery and Gist publication
  • 2026-06-15: advisory: CVE-2026-50869 published by NVD/MITRE

References

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