CVE-2026-48940: Joomla Extension - getk2.org - Stored-XSS in K2 extension for Joomla < 2.26

Severity: low (CVSS 3.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-25 · updated 2026-10-25
Weakness: CWE-79

Description

A Joomla user with K2 "create item" rights (Author tier by default) can submit an article whose `embedVideo` POST field contains a raw `<script>` tag; K2 stores it verbatim and renders it unescaped to any visitor of the article page.

Affected products

getk2.org K2 extension for Joomla: through 2.26

References

https://www.getk2.org/

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