Stored XSS in JoomGallery by Joomla Extensions Vendor
CVE-2026-66917

8.6HIGH

Key Information:

Vendor

Joomgalleryfriends.net

Status
Joomgallery Extension For Joomla
Vendor
CVE Published:
22 August 2026

What is CVE-2026-66917?

The JoomGallery extension for Joomla is susceptible to a stored cross-site scripting (XSS) vulnerability. This flaw allows authenticated users with the appropriate privileges to embed malicious JavaScript into uploaded images. When other users visit the affected page, the injected script executes in their browsers, potentially compromising their session and data security.

Affected Version(s)

JoomGallery extension for Joomla 4.0.0-4.3.0

References

https://www.joomgalleryfriends.net/
product

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Toan Le
.