CVE-2026-48941
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
A vulnerability in the K2 component for Joomla! allows an unauthenticated attacker to delete arbitrary directories via the `sigProFolder` parameter in the `item.checkin` task. The attacker can exploit this flaw to remove gallery directories under `/media/k2/galleries/`.
Risk Assessment
The risk involves remote deletion of gallery directories without authentication, potentially leading to data loss, site disruption, or further attack escalation.
Recommendation
Immediately update the K2 component to the latest version containing the fix. Until then, disable the `item.checkin` task or apply WAF rules to block dangerous parameters.
Other vulnerabilities in K2
See all- CVE-2026-48946Medium
A vulnerability in the K2 component allows authors to upload PHP files as article attachments. Apache executes these files, enabling remote PHP code execution in the web server context.
- CVE-2026-48945Medium
A vulnerability in the K2 component for Joomla! allows uploading a ZIP/TAR archive containing PHP files to the gallery directory. The system only renames image files, leaving non-image files (including PHP) extracted as-is and accessible via HTTP, enabling remote code execution.
- CVE-2026-48944Medium
A vulnerability in the K2 component for Joomla! allows an Author to copy any file readable by the web user (e.g., configuration.php or /etc/passwd) to the /media/k2/attachments/ directory by manipulating the `attachment[N][existing]` POST field. Lack of source path validation and `..` filtering in `JPath::clean` enables a path traversal attack.
- CVE-2026-48943Medium
A mass-assignment vulnerability in K2 ≤ 2.24 exists in the `plg_user_k2` system user plugin. A registered Joomla user can, by including the `K2UserForm=1` field in a standard `com_users` `profile.save` POST request, write arbitrary values into the `notes`, `image`, and `plugins` columns of their own row in the `#__k2_users` table, which are not exposed by the K2 frontend profile-edit form.
- CVE-2026-48942Medium
K2 version 2.26 and earlier renders the `#__k2_users.image` column directly into HTML `src` attributes via two distinct templates, in both cases without HTML escaping.
- CVE-2026-48940Low
A Joomla user with K2 'create item' rights (Author tier by default) can submit an article whose `embedVideo` POST field contains a raw `<script>` tag; K2 stores it verbatim and renders it unescaped to any visitor of the article page.
Original NVD description (English source)
The K2 frontend `item.checkin` task accepts an unauthenticated `sigProFolder` query parameter and uses it directly to address a `JFolder::delete()` call under `/media/k2/galleries/`