What’s Vulnerable › Vulnerabilities

CVE-2026-66490: Joomla Extension - balbooa.com - Stored cross-site scripting via a comment avatar in Gridbox < 2.20.2

• Severity: medium (CVSS 6.1 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: 2026-07-29 · updated 2026-10-23
• Weakness: CWE-79

Description

Joomla Extension - balbooa.com - Stored cross-site scripting via a comment avatar in Gridbox < 2.20.2

Affected products

• balbooa.com Gridbox extension for Joomla: before 2.20.2 — fixed in 2.20.2

How to fix

Upgrade to a fixed version: balbooa.com Gridbox extension for Joomla 2.20.2. Check the vendor advisory for mitigations.

References

• https://mysites.guru/blog/gridbox-23-critical-vulnerabilities/
• https://www.balbooa.com/gridbox

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