CVE-2026-48944

MEDIUM

Joomla Extension - getk2.com - Exposure of sensitive files via attachment copy in K2 extension for Joomla < 2.26

Title source: cna

Description

The K2 frontend article-save handler accepts an `attachment[N][existing]` POST field that is concatenated with `JPATH_SITE/` and passed to `JFile::copy()`. `JPath::clean` does NOT strip `..`, and there is no allow-list of source paths. An Author can therefore copy `configuration.php` (or any other file readable by the web user — including `../../../etc/passwd`) into `/media/k2/attachments/`, then retrieve the contents via the K2 attachment-download endpoint.

References (1)

Core 1

Core References

Product product

https://www.getk2.org/

Scores

CVSS v3 6.5

EPSS 0.0029

EPSS Percentile 21.8%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-22

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