CVE-2026-114398: Trudesk unrestricted file upload to stored XSS

CVE-2026-114398 · Severity: medium · CVSS 5.4 · Published 2026-10-21

Trudesk is an open-source help desk and ticketing system. Authenticated users can upload HTML or SVG files disguised as images to the public webroot, enabling stored cross-site scripting (XSS) attacks that run in the browsers of all users viewing the affected instance, potentially leading to account compromise or data theft.

Technologies: Polonel Trudesk. Vendors: Polonel.

Quick answers

Is CVE-2026-114398 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-114398 being exploited in the wild.
How severe is CVE-2026-114398?
Medium severity, with a CVSS score of 5.4, published 21 October 2026.
Which products and versions are affected?
Polonel Trudesk through 1.2.11.
Is there a fix for CVE-2026-114398?
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-2026-114398 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-114398?
Check whether you run Polonel Trudesk 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

The uploadlogo, uploadpagelogo, and uploadfavicon endpoints in Trudesk through 1.2.11 perform insufficient MIME type validation, allowing authenticated attackers to spoof image MIME types and upload script-bearing HTML or SVG files. These files are stored in the publicly accessible /assets/ directory and served unauthenticated, enabling stored XSS and branding replacement. Authentication is required to exploit this.

Affected products

  • polonel Trudesk through 1.2.11

Timeline

  • 2026-10-21: disclosed

References

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