Quick answers
- Is CVE-2026-48945 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-48945 being exploited in the wild.
- How severe is CVE-2026-48945?
- 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-2026-48945?
- 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-2026-48945 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-48945?
- 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 exists in the K2 extension for Joomla (versions 1.0 through 2.26) within the article gallery upload component. When a user uploads a zip or tar archive, the extension extracts the contents to `/media/k2/galleries/<id>/`. While the system renames recognized image formats (gif, jpg, jpeg, png, webp) to safe filenames, it fails to sanitize or rename other file types. Consequently, an attacker with gallery upload privileges can include a PHP script within an archive, which remains executable via direct HTTP access after extraction, leading to full remote code execution (RCE).
Affected products
- getk2.com K2 extension for Joomla 1.0-2.26
Timeline
- 2026-06-25: disclosed: CVE published by the Joomla! Project