CVE-2025-15438 PluXml Media Management medias.php __destruct deserialization

Medium 5.1 Published 2 Jan 2026 Updated 23 Feb 2026

Remote attackers can achieve code execution via unsafe deserialization in PluXml's media management module, requiring immediate patching.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-15438?

CVE-2025-15438 is a medium-severity unsafe deserialization vulnerability in PluXml, published on 2 Jan 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A vulnerability was determined in PluXml up to 5.8.22. Affected is the function FileCookieJar::__destruct of the file core/admin/medias.php of the component Media Management Module. Executing a manipulation of the argument File can lead to deserialization. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was informed early about this issue and announced that "[w]e fix this issue in the next version 5.8.23". A patch for it is ready.

Weakness: CWE-502, CWE-20

Which versions are affected by CVE-2025-15438?

It affects 1 product.

Products include Pluxml Pluxml.

How do I fix CVE-2025-15438?

No fix has been published for CVE-2025-15438 yet. Limit exposure of the affected software until one is available.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2025-15438 being exploited?

There is no known exploitation of CVE-2025-15438 in the wild and no public exploit code.

Sources

Also known as GHSA-8v28-3j53-xvq8, UBUNTU-CVE-2025-15438.