CVE-2026-77028 yootheme.com CVE debrief

Who should care

Administrators and users of Joomla sites with the Zoo extension installed, especially those with versions less than 4.1.66, should be aware of this vulnerability. This includes site owners, developers, and security teams responsible for maintaining and securing Joomla installations. They should review the vulnerability details, assess their exposure, and take necessary actions to mitigate the risk.

Technical summary

The vulnerability exists in the Zoo extension for Joomla, versions less than 4.1.66. It allows for reflected XSS and open redirect attacks via the submission redirect parameter. This could potentially allow attackers to redirect users to malicious sites or execute malicious scripts. The CVSS score of 5.3 indicates a medium severity vulnerability.

Defensive priority

Medium priority given the CVSS score of 5.3 and the potential for reflected XSS and open redirect attacks.

Recommended defensive actions

• Verify the version of Zoo extension and update to 4.1.66 or later if necessary.
• Implement input validation and output encoding to prevent reflected XSS attacks.
• Configure redirects to prevent open redirect attacks.
• Monitor for suspicious activity and implement logging and incident response plans.

Evidence notes

The evidence provided indicates a vulnerability in the Zoo extension for Joomla, versions less than 4.1.66, allowing for reflected XSS and open redirect attacks via the submission redirect parameter. However, the details are limited, and further verification is recommended. Defenders should verify the version of the Zoo extension installed, review the official advisory, and consider the potential impact on their systems.

Official resources