Profile-photo overwrite via unguarded cross-origin POST
Published May 11, 2026 · Updated May 11, 2026
CSRF in AVideo 29.0 and earlier allows remote attackers to overwrite a logged-in user's profile photo via a cross-origin POST. The userSavePhoto.php handler accepts base64 input and writes the decoded bytes under the session user's deterministic photo path without a CSRF token, origin check, or MIME validation. Exploitation requires the logged-in user to visit an attacker-controlled page; the forged request also invalidates site-wide caches but does not disclose data or execute code.
Summary
What happened
CSRF in AVideo 29.0 and earlier allows remote attackers to overwrite a logged-in user's profile photo via a cross-origin POST. The userSavePhoto.php handler accepts base64 input and writes the decoded bytes under the session user's deterministic photo path without a CSRF token, origin check, or MIME validation. Exploitation requires the logged-in user to visit an attacker-controlled page; the forged request also invalidates site-wide caches but does not disclose data or execute code.
The record
- CVE
- CVE-2026-43877
- Published
- May 11, 2026
- Updated
- May 11, 2026
- Vendor
- World Wide Broadcast Network
- Product
- AVideo
- Classifications
- CWE-352, T1204.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 11, 2026CVE publishedPublication date reported by the CVE source.
- May 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=<= 29.0
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.
Public exploit references
- Cross-origin profile-photo overwrite proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo