Quick answers
- Is CVE-2026-48943 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-48943 being exploited in the wild.
- How severe is CVE-2026-48943?
- Informational severity, with a CVSS score of 0, published 25 June 2026.
- Which products and versions are affected?
- JoomlaWorks K2 1.0-2.26.
- Is there a fix for CVE-2026-48943?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-48943 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-48943?
- Check whether you run JoomlaWorks K2 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A mass-assignment (CWE-915) defect exists in the K2 system user plugin `plg_user_k2` for Joomla. By injecting the `K2UserForm=1` field into a standard `com_users` `profile.save` POST request, an authenticated 'Registered' user can bypass frontend form restrictions. This allows the attacker to write arbitrary values into the `notes`, `image`, and `plugins` columns of their own record in the `#__k2_users` database table. These fields are not intended to be user-editable via the standard K2 frontend profile-edit form.
Affected products
- JoomlaWorks K2 extension for Joomla 1.0-2.26
Timeline
- 2026-06-25: disclosed
- 2026-06-25: advisory