CVE-2026-48942 Joomla Extension - getk2.org - Stored-XSS in K2 extension for Joomla < 2.26
Attackers can inject malicious scripts via user image fields in the K2 extension, potentially stealing sessions or executing code in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-48942?
CVE-2026-48942 is a medium-severity cross-site scripting vulnerability in getk2.org K2 extension for Joomla, published on 25 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
K2 ≤ 2.26 renders the `#__k2_users.image` column directly into HTML `src` attributes via two distinct templates, in both cases without HTML escaping.
Weakness: CWE-79
Which versions are affected by CVE-2026-48942?
It affects 1 product.
Products include Joomlaworks K2.
How do I fix CVE-2026-48942?
No fix has been published for CVE-2026-48942 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-48942 being exploited?
There is no known exploitation of CVE-2026-48942 in the wild and no public exploit code.
Other vulnerabilities in getk2.org K2 extension for Joomla
- CVE-2019-19634 class.upload.php in verot.net omits .pht from the set of dangerous file extensions
- CVE-2019-19576 Remote code execution in verot/class.upload.php
- CVE-2018-7482 Path traversal in n/a
- CVE-2026-48941 Joomla Extension - getk2.org - Unauthenticated folder delete in K2 extension for Joomla < 2.26
- CVE-2026-48943 Joomla Extension - getk2.org - Authenticated user property mass-assignment in K2 extension for Joomla < 2.26
Sources
Also known as GHSA-5hmf-7m33-2v23.