WWBN AVideo up to 26.0 functions.php sanitizeFFmpegCommand os command injection

Summaryinfo

A vulnerability was found in WWBN AVideo up to 26.0. It has been classified as critical. This affects the function sanitizeFFmpegCommand of the file plugin/API/standAlone/functions.php. This manipulation causes os command injection. This vulnerability is registered as CVE-2026-33482. Remote exploitation of the attack is possible. No exploit is available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability has been found in WWBN AVideo up to 26.0 and classified as critical. Affected by this vulnerability is the function sanitizeFFmpegCommand of the file plugin/API/standAlone/functions.php. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `sanitizeFFmpegCommand()` function in `plugin/API/standAlone/functions.php` is designed to prevent OS command injection in ffmpeg commands by stripping dangerous shell metacharacters (`&&`, `;`, `|`, `` ` ``, `<`, `>`). However, it fails to strip `$()` (bash command substitution syntax). Since the sanitized command is executed inside a double-quoted `sh -c` context in `execAsync()`, an attacker who can craft a valid encrypted payload can achieve arbitrary command execution on the standalone encoder server. Commit 25c8ab90269e3a01fb4cf205b40a373487f022e1 contains a patch.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-33482 since 03/20/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

By approaching the search of inurl:plugin/API/standAlone/functions.php it is possible to find vulnerable targets with Google Hacking.

Applying the patch 25c8ab90269e3a01fb4cf205b40a373487f022e1 is able to eliminate this problem.

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Productinfo

Vendor

• WWBN

Name

• AVideo

Version

• 26.0

License

• open-source

Website

• Product: https://github.com/WWBN/AVideo/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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