CVE-2026-48942 is a CWE-79 (Improper Neutralization of Input During Web Page Generation) vulnerability in the K2 extension for Joomla (versions 1.0 to 2.26). The vulnerability occurs because the extension renders the `#__k2_users.image` database column directly into HTML src attributes in two distinct templates without applying HTML escaping. This allows an attacker to inject malicious scripts that may execute in the context of a victim's browser, potentially leading to information disclosure or session hijacking. The CVSS 3.1 base score is 6.1, indicating a medium severity vulnerability with network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality and integrity but no impact on availability.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of users viewing affected pages, potentially leading to information disclosure or manipulation of user sessions. The impact is limited to confidentiality and integrity with no availability impact. No known exploits are reported in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should avoid rendering untrusted input in HTML attributes without proper escaping. Monitor the vendor's official channels for updates and patches addressing this vulnerability.