CVE-2026-48943 Joomla Extension - getk2.org - Authenticated user property mass-assignment in K2 extension for Joomla < 2.26

What is CVE-2026-48943?

CVE-2026-48943 is a medium-severity missing authorization vulnerability in getk2.org K2 extension for Joomla, published on 25 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

K2 ≤ 2.24 contains a mass-assignment defect in the K2 system user plugin `plg_user_k2`. A Registered Joomla user, by including the field `K2UserForm=1` in a standard `com_users` `profile.save` POST, can write arbitrary values into the `notes`, `image`, and `plugins` columns of their own row in the `#__k2_users` table — none of which are exposed by the K2 frontend profile-edit form.

Weakness: CWE-915

Which versions are affected by CVE-2026-48943?

It affects 1 product.

Products include Joomlaworks K2.

How do I fix CVE-2026-48943?

No fix has been published for CVE-2026-48943 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-48943 being exploited?

There is no known exploitation of CVE-2026-48943 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 Critical 9.8
• CVE-2019-19576 Remote code execution in verot/class.upload.php Critical 9.8
• CVE-2018-7482 Path traversal in n/a High 7.5
• CVE-2026-48941 Joomla Extension - getk2.org - Unauthenticated folder delete in K2 extension for Joomla < 2.26 Medium 6.5
• CVE-2026-48944 Joomla Extension - getk2.org - Exposure of sensitive files via attachment copy in K2 extension for Joomla < 2.26 Medium 6.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-x6c6-vg4w-8r3r.