CVE-2025-67291: Piranha CMS stored XSS in Media module folder name

CVE-2025-67291 · Severity: medium · CVSS 6.1 · Published 2025-12-22

Piranha CMS, a content management system used to build and manage websites, contains a security flaw in its media management module. An attacker can inject malicious scripts into the names of media folders, which then run in the browsers of other users who view or edit those folders. This could lead to unauthorized actions being performed in the context of the victim's session, such as data theft or account compromise.

Technologies: Piranha (NuGet). Vendors: NuGet.

Quick answers

Is CVE-2025-67291 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-67291 being exploited in the wild.
How severe is CVE-2025-67291?
Medium severity, with a CVSS score of 6.1, published 22 December 2025.
Which products and versions are affected?
Piranha (NuGet) ECOSYSTEM:introduced=0,last_affected=12.0.0.
Is there a fix for CVE-2025-67291?
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-2025-67291 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2025-67291?
Check whether you run Dotnetfoundation Piranha Cms or Piranha (NuGet) 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 Piranha CMS v12.1 within the Media module. The root cause is improper neutralization of user-supplied input in the 'Name' field when creating or editing media folders (CWE-79). An authenticated attacker can inject a malicious JavaScript payload into a folder name; this payload is stored on the server and executed in the security context of any user who subsequently views the Media page or interacts with the folder's edit controls. While the CVSS vector provided by CISA-ADP suggests no privileges are required (PR:N), the technical proof-of-concept indicates the attacker typically needs to be an authenticated user with access to the manager interface. Exploitation can lead to session hijacking or unauthorized administrative actions.

Affected products

  • Piranha CMS Piranha CMS 12.1

Identifiers

  • CVE-2025-67291
  • GHSA-83fp-hh9m-c2jq

Timeline

  • 2025-12-22: advisory: Initial disclosure and CVE assignment

References

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