CVE-2026-48942 getk2.org CVE debrief

Who should care

Administrators and users of Joomla installations with the K2 extension (version ≤ 2.26) should be aware of this vulnerability. Successful exploitation could allow an attacker to inject malicious scripts, potentially leading to unauthorized actions or data exposure.

Technical summary

The vulnerability exists in the K2 extension for Joomla, specifically in versions ≤ 2.26. The `#__k2_users.image` column is rendered directly into HTML `src` attributes in two templates without proper HTML escaping. This allows an attacker to inject malicious HTML, potentially leading to XSS attacks. The vulnerability has a CVSS score of 6.1 and is classified as MEDIUM severity.

Defensive priority

Apply patches or updates to K2 extension version 2.26 or later. Ensure proper input validation and output encoding for user-supplied data.

Recommended defensive actions

• Apply patches or updates to K2 extension version 2.26 or later.
• Ensure proper input validation and output encoding for user-supplied data.
• Monitor for suspicious activity related to the `#__k2_users.image` column.
• Consider implementing additional security measures, such as Content Security Policy (CSP).
• Review and update incident response plans to address potential XSS attacks.

Evidence notes

The CVE record and NVD detail provide information on the vulnerability, including its CVSS score and affected versions. The source item URL provides additional context from the NVD database.

Official resources