CVE-2026-66917 PUBLISHED

Joomla Extension - joomgalleryfriends.net - Stored XSS in JoomGallery < 4.4.0

Assigner: Joomla
Reserved: 28.07.2026 Published: 22.08.2026 Updated: 22.08.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 8.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

Product Status

Vendor	joomgalleryfriends.net
Product	JoomGallery extension for Joomla
Versions	Default: unaffected Version 4.0.0-4.3.0 is affected

Credits

Toan Le finder

References

https://www.joomgalleryfriends.net/

Problem Types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE

Impacts

CAPEC-18 XSS Targeting Non-Script Elements