CVE-2026-89243 WWBN CVE debrief

Who should care

Administrators and security teams responsible for AVideo deployments should assess exposure and prioritize remediation to prevent potential injection of malicious HTML and JavaScript, execution of malicious code, elevation of privileges, and disruption of user manager interface functionality. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should also plan vendor-supported 9

Why it matters

Administrators and security teams responsible for AVideo deployments should assess exposure and prioritize remediation to prevent potential injection of malicious HTML and JavaScript, execution of malicious code, elevation of privileges, and disruption of user manager interface functionality.

• Potential injection of malicious HTML and JavaScript in the user manager interface
• Execution of malicious code in the browser of other administrators accessing the interface
• Elevation of privileges for administrators with canAdminUserGroups permission
• Possible disruption of user manager interface functionality

Technical summary

The AVideo application contains a stored cross-site scripting vulnerability in the UserGroups::setGroup_name() function. This vulnerability allows administrators with canAdminUserGroups permission to inject malicious HTML and JavaScript, which executes in the browser when other administrators access the user manager interface. The vulnerability can lead to potential injection of malicious HTML and JavaScript in the user manager interface, execution of malicious code in the browser of other administrators accessing the interface, elevation of privileges for administrators with canAdminUserGroups permission, and possible disruption of user manager interface functionality. The CVE record and NVD entry provide 8

Defensive priority

Administrators should prioritize verifying and applying patches or workarounds to prevent exploitation.

Recommended defensive actions

• Verify and apply patches or workarounds to prevent exploitation
• Restrict access to the user manager interface to trusted administrators
• Monitor for suspicious activity in the user manager interface
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected versions and remediation is needed. The vulnerability is in the UserGroups::setGroup_name() function, and administrators with canAdminUserGroups permission can inject malicious HTML and JavaScript. The AVideo application contains a stored cross-site scripting vulnerability. The CVE Program and NVD provide official records and assessments, but further details on affected versions and patches are required for comprehensive risk 7

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.