EUVD-2026-280176

fkie_cve-2026-34716

WWBN AVideo is an open source video platform. In versions 26.0 and prior, the AVideo YPTSocket plugin's caller feature renders incoming call notifications using the jQuery Toast Plugin, passing the caller's display name directly as the heading parameter. The toast plugin constructs the heading as raw HTML ('<h2>' + heading + '</h2>') and inserts it into the DOM via jQuery's .html() method, which parses and executes any embedded HTML or script content. An attacker can set their display name to an XSS payload and trigger code execution on any online user's browser simply by initiating a call - no victim interaction is required beyond being connected to the WebSocket. At time of publication, there are no publicly available patches.

GHSA-w4hp-w536-jg64 — AVideo: DOM XSS via Unsanitized Display Name in WebSocket Call Notification

Affected: Packagist: wwbn/avideo

## Summary

The AVideo YPTSocket plugin's caller feature renders incoming call notifications using the jQuery Toast Plugin, passing the caller's display name directly as the `heading` parameter. The toast plugin constructs the heading as raw HTML (`'<h2>' + heading + '</h2>'`) and inserts it into the DOM via jQuery's `.html()` method, which parses and executes any embedded HTML or script content. An attacker can set their display name to an XSS payload and trigger code execution on any online user's browser simply by initiating a call - no victim interaction is required beyond being connected to the WebSocket.

## Details

When a call notification arrives via WebSocket, the caller's identity is extracted from the JSON message:

```javascript // plugin/YPTSocket/caller.js:73 userIdentification = json.from_identification; ```

This value is passed directly to the jQuery Toast Plugin as the heading:

```javascript // plugin/YPTSocket/caller.js:89 heading: userIdentification, ```

Inside the jQuery Toast Plugin, the heading is rendered as raw HTML:

```javascript // node_modules/jquery-toast-plugin/src/jquery.toast.js:60 // Constructs: '<h2>' + heading + '</h2>' // Then inserts via .html() ```

jQuery's `.html()` method parses the string as HTML and executes any script-bearing elements (such as `<img onerror>`, `<svg onload>`, etc.).

There is a secondary injection vector in the same file where the full JSON message is placed inside a single-quoted `onclick` attribute:

```javas…

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EUVD-2026-280176

fkie_cve-2026-34716

GHSA-w4hp-w536-jg64 — AVideo: DOM XSS via Unsanitized Display Name in WebSocket Call Notification