CVE-2026-48944 — Joomla Extension - getk2.org - Exposure of sensitive files via attachment copy in K2 extension for Joomla < 2.26

CVE-2026-48944

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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
getk2.org / K2 extension for Joomla	affected 1.0-2.26

CWE

CWE-22

References

https://www.getk2.org/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.