CVE-2026-48946

MEDIUM

K2 for Joomla < 2.26 - Attachment PHP Upload Remote Code Execution

Title source: manual

Description

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.

References (1)

Core 1

Core References

Product product

https://www.getk2.org/

Scores

CVSS v3 6.3

EPSS 0.0017

EPSS Percentile 6.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-434

Status published

Products (3)

getk2.com/K2 extension for Joomla 1.0-2.26

getk2.org/K2 extension for Joomla 1.0-2.26

joomlaworks/k2 < 2.26

Published Jun 25, 2026

Tracked Since Jun 25, 2026