CVE-2026-66917CWE-79cross-site-scripting

CVE-2026-66917

published August 22, 2026

CVSS

8.6

EPSS

Percentile

43.2

In the wild

Unconfirmed

What it is

Joomla Extension - joomgalleryfriends.net - Stored XSS in JoomGallery < 4.4.0 - An authenticated, privileged can store an XSS payload in any image causing JS execution in every visitor's browser.

The record

Technical detail

CVSS: 8.6 · NONE
CVSS v4.0: 8.6 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS: 0.00518 · 43.2th percentile
Weakness: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published: 2026-08-22T16:16Z

References (1)

https://www.joomgalleryfriends.net/ · [email protected]

EPSS history

Timeline

22 AUG 11:12Z
Joomla Extension - joomgalleryfriends.net - Stored XSS in JoomGallery < 4.4.0
cvelistv5