CVE-2026-24350: PluXml CMS Stored XSS via SVG file upload

CVE-2026-24350 · Severity: medium · CVSS 5.4 · Published 2026-02-27

PluXml CMS, a lightweight content management system that stores data in XML files, is vulnerable to a security flaw in its file upload system. An attacker with basic user permissions can upload a specially crafted image file that, when viewed by another user or administrator, executes malicious code in their browser. This could allow the attacker to steal session information, perform actions on behalf of other users, or deface parts of the website.

Technologies: Pluxml. Vendors: Pluxml.

Quick answers

Is CVE-2026-24350 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-24350 being exploited in the wild.
How severe is CVE-2026-24350?
Medium severity, with a CVSS score of 5.4, published 27 February 2026.
Which products and versions are affected?
Pluxml 5.8.21, 5.9.0-rc7.
Is there a fix for CVE-2026-24350?
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-2026-24350 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-24350?
Check whether you run Pluxml 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 Stored Cross-Site Scripting (XSS) vulnerability exists in PluXml CMS due to improper sanitization of uploaded SVG files. An authenticated attacker can upload an SVG file containing a malicious JavaScript payload. In version 5.8.21, the payload executes when a victim clicks the link associated with the uploaded image; in version 5.9.0-rc7, the payload executes when the file is accessed directly. This vulnerability allows for the execution of arbitrary scripts in the victim's browser, potentially leading to session hijacking or unauthorized administrative actions. While versions 5.8.21 and 5.9.0-rc7 are confirmed vulnerable, other versions may also be affected as the vendor has not provided a definitive fix or version range.

Affected products

  • PluXml PluXml CMS 5.8.21, 5.9.0-rc7

Timeline

  • 2026-02-27: advisory: Initial disclosure by CERT.PL
  • 2026-02-27: disclosed: NVD publication date

References

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