CVE-2026-48944

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

CVSS 6.5 MEDIUMEPSS 0.3%CWE-22

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.5EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

25 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

getk2.com · K2 extension for Joomla

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References

https://www.getk2.org/