CVE-2026-34716 WWBN CVE debrief

Who should care

Users of AVideo YPTSocket plugin versions 26.0 and prior should be aware of this vulnerability and take necessary precautions to prevent exploitation. This includes administrators and security teams responsible for managing and securing the affected systems.

Technical summary

The AVideo YPTSocket plugin's caller feature renders incoming call notifications using jQuery Toast Plugin, passing the caller's display name directly as the heading parameter. The toast plugin constructs the heading as raw HTML and inserts it into the DOM via jQuery's .html() method, which parses and executes any embedded HTML or script content. This allows an attacker to set their display name to an XSS payload and trigger code execution on any online user's browser simply by initiating a call. The vulnerability affects AVideo YPTSocket plugin versions 26.0 and prior.

Defensive priority

Medium

Recommended defensive actions

• Update AVideo YPTSocket plugin to a version beyond 26.0 if available
• Implement input validation and sanitization for caller display names
• Use a Web Application Firewall (WAF) to detect and prevent XSS attacks
• Monitor for suspicious activity and implement incident response plan
• 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

Evidence notes

The CVE record was published on 2026-03-31T21:16:31.607Z and was last modified on 2026-07-24T20:10:00.147Z. The NVD entry is currently Analyzed. This information is based on the NVD entry and the CVE record. The vulnerability affects AVideo YPTSocket plugin versions 26.0 and prior. There are no publicly available patches at the time of publication.

Official resources