CVE-2026-48946: The K2 frontend article-attachment upload path accepts files whose extension is `.php`, and Apache's standard mod_php matches `\.php$` and executes them under…

PriorityP344medium6.3CVSS 3.1

AVNACLPRLUINSUCLILAL

EPSS

0.17%

6.4th percentile

The K2 frontend article-attachment upload path accepts files whose extension is `.php`, and Apache's standard mod_php matches `\.php$` and executes them under the K2 web user. A K2 Author can upload a `shell.php`, then fetch `/media/k2/attachments/shell.php` and execute arbitrary PHP code in the web server's context.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
getk2.org	k2_extension_for_joomla	—	—
joomlaworks	k2	<= 2.26	—

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