CVE-2026-48944

MediumCVSS 6.5/10Last modified Oct 25, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-22

Affected software

Vendor	Product	Versions
getk2.org	K2 extension for Joomla	1.0-2.26

References

https://www.getk2.org/Product

Timeline

Published: Jun 25, 2026
Last modified: Oct 25, 2026
NVD status: Analyzed

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