Mass phishing via missing CSRF token
Published Mar 31, 2026 · Updated Mar 31, 2026
CSRF in WWBN AVideo 26.0 and earlier allows remote attackers to send arbitrary HTML email to every registered platform user. The objects/emailAllUsers.json.php endpoint accepts a POST message, renders it as HTML, and selects all users when no email is supplied, without validating a CSRF token. Exploitation requires an authenticated administrator to visit an attacker-controlled page; SameSite=None cookies carry the session cross-origin, enabling email from the instance's SMTP identity.
Summary
What happened
CSRF in WWBN AVideo 26.0 and earlier allows remote attackers to send arbitrary HTML email to every registered platform user. The objects/emailAllUsers.json.php endpoint accepts a POST message, renders it as HTML, and selects all users when no email is supplied, without validating a CSRF token. Exploitation requires an authenticated administrator to visit an attacker-controlled page; SameSite=None cookies carry the session cross-origin, enabling email from the instance's SMTP identity.
The record
- CVE
- CVE-2026-34611
- Published
- Mar 31, 2026
- Updated
- Mar 31, 2026
- Vendor
- World Wide Broadcast Network
- Product
- AVideo
- Classifications
- CWE-352, T1566.002
- Attack vector
- network
- Privileges
- unauthenticated
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-c4xj-x7p8-3x7q cross-origin form proof of conceptfunctional · demonstrated
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Technologies
Your stack
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Your stack
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