Calendar event spoofing via CRLF injection
Published May 11, 2026 · Updated May 11, 2026
CRLF injection in AVideo 29.0 and earlier allows remote attackers to forge calendar events through an unauthenticated ICS endpoint. The Scheduler downloadICS.php endpoint passes title, description, and joinURL values to ICS::escape_string(), which escapes commas and semicolons but leaves CR/LF intact, allowing injected lines to create additional VEVENT blocks. Exploitation requires the Scheduler plugin to be enabled and a user to import the returned file; the forged event can contain attacker-chosen text and clickable links.
Summary
What happened
CRLF injection in AVideo 29.0 and earlier allows remote attackers to forge calendar events through an unauthenticated ICS endpoint. The Scheduler downloadICS.php endpoint passes title, description, and joinURL values to ICS::escape_string(), which escapes commas and semicolons but leaves CR/LF intact, allowing injected lines to create additional VEVENT blocks. Exploitation requires the Scheduler plugin to be enabled and a user to import the returned file; the forged event can contain attacker-chosen text and clickable links.
The record
- CVE
- CVE-2026-43882
- Published
- May 11, 2026
- Updated
- May 11, 2026
- Vendor
- World Wide Broadcast Network
- Product
- AVideo
- Classifications
- CWE-93
- 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.
Weakness, pattern, technique
Public exploit references
- GHSA-mwgh-92m2-wvhv ICS injection 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