Quick answers
- Is CVE-2026-48946 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-48946 being exploited in the wild.
- How severe is CVE-2026-48946?
- Informational severity, with a CVSS score of 8.8, published 25 June 2026.
- Which products and versions are affected?
- JoomlaWorks K2 1.0-2.26.
- Is there a fix for CVE-2026-48946?
- 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-2026-48946 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-48946?
- 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
An unrestricted file upload vulnerability (CWE-434) exists in the K2 frontend article-attachment upload path. The application fails to validate or sanitize file extensions, allowing files with a `.php` extension to be uploaded to the `/media/k2/attachments/` directory. Because standard Apache mod_php configurations execute files ending in `.php`, an authenticated user with 'Author' privileges can upload a web shell and execute arbitrary PHP code in the context of the web server user. The vulnerability affects K2 versions 1.0 through 2.26.
Affected products
- getk2.com K2 extension for Joomla 1.0-2.26
Timeline
- 2026-06-25: disclosed: CVE published by Joomla! Project