CVE-2026-48940 Joomla Extension - getk2.org - Stored-XSS in K2 extension for Joomla < 2.26
Stored XSS in K2 extension allows attackers to inject scripts via video embed fields, potentially compromising user sessions and site integrity.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-48940?
CVE-2026-48940 is a low-severity cross-site scripting vulnerability in getk2.org K2 extension for Joomla, published on 25 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
A Joomla user with K2 "create item" rights (Author tier by default) can submit an article whose `embedVideo` POST field contains a raw `<script>` tag; K2 stores it verbatim and renders it unescaped to any visitor of the article page.
Weakness: CWE-79
Which versions are affected by CVE-2026-48940?
It affects 1 product.
Products include Joomlaworks K2.
How do I fix CVE-2026-48940?
No fix has been published for CVE-2026-48940 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-2026-48940 being exploited?
There is no known exploitation of CVE-2026-48940 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-4gq9-7rp6-9749.