CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 6.5. See the original NVD description below for full technical details.
CVE
CVE-2026-48944
Severity
MEDIUM
CVSS
6.5
EPSS
0.29%
Original NVD 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.
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