Authenticated browser code execution via forged calls
Published Mar 31, 2026 · Updated Mar 31, 2026
DOM-based XSS in AVideo 26.0 and earlier allows remote authenticated users to execute JavaScript in an online user’s browser via a forged call. The YPTSocket caller passes from_identification from a WebSocket message to a jQuery Toast heading that builds raw HTML and inserts it with .html(). A custom WebSocket client must target an online user; connection to an authenticated page is enough to expose browser-accessible session data and actions.
Summary
What happened
DOM-based XSS in AVideo 26.0 and earlier allows remote authenticated users to execute JavaScript in an online user’s browser via a forged call. The YPTSocket caller passes from_identification from a WebSocket message to a jQuery Toast heading that builds raw HTML and inserts it with .html(). A custom WebSocket client must target an online user; connection to an authenticated page is enough to expose browser-accessible session data and actions.
The record
- CVE
- CVE-2026-34716
- Published
- Mar 31, 2026
- Updated
- Mar 31, 2026
- Vendor
- World Wide Broadcast Network
- Product
- AVideo
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 31, 2026CVE publishedPublication date reported by the CVE source.
- Mar 31, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=<= 26.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- GHSA-w4hp-w536-jg64 WebSocket call proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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