# CVE-2026-48943: JoomlaWorks K2 mass-assignment in plg_user_k2 plugin

Source: https://junglewise.ai/threats/cve-2026-48943-joomlaworks-k2-mass-assignment-in-plg-user-k2-plugin  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-25. Updated: 2026-06-25  
License: CC BY 4.0 with a link back

CVE-2026-48943 · Severity: info · CVSS 0 · Published 2026-06-25

K2 is a popular content management extension for Joomla that provides enhanced article and user profile features. A security flaw allows registered users to modify hidden parts of their own profile data that are normally restricted. This could allow a user to change their profile image, notes, or plugin settings in ways the website administrator did not intend.

Technologies: [JoomlaWorks K2](https://junglewise.ai/threats/technologies/k2). Vendors: [JoomlaWorks](https://junglewise.ai/threats/vendors/joomlaworks).

## 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

## References

- [https://www.getk2.org/](https://www.getk2.org/)

## Related threats

- [Joomla K2 Extension Unrestricted File Upload in Article Attachments](https://junglewise.ai/threats/cve-2026-48946-joomla-k2-extension-unrestricted-file-upload-in-article)
- [Joomla K2 extension unrestricted file upload in article gallery upload](https://junglewise.ai/threats/cve-2026-48945-joomla-k2-extension-unrestricted-file-upload-in-article-gallery)
- [Joomla K2 path traversal in article-save handler](https://junglewise.ai/threats/cve-2026-48944-joomla-k2-path-traversal-in-article-save-handler)
- [Joomla K2 Extension Cross-Site Scripting in User Images](https://junglewise.ai/threats/cve-2026-48942-joomla-k2-extension-cross-site-scripting-in-user-images)
- [Joomla K2 extension unauthorized folder deletion in item.checkin task](https://junglewise.ai/threats/cve-2026-48941-joomla-k2-extension-unauthorized-folder-deletion-in-item-checkin)