Possible osTicket PHP Filter Chain Injection via Anonymous Ticket Endpoints (via webserver)
- Category
- webserver
- Author
- HuntRule
- Published
- 2026-09-27
- Updated
- 2026-09-27
ATT&CK techniques
Initial Access → DiscoveryRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects HTTP requests to the anonymous osTicket open, view, or account endpoints that carry a PHP filter chain such as a php filter wrapper with base64 or iconv conversions. This corresponds to CVE-2026-22200 which abuses filter chains for arbitrary file read and code execution. Ordinary ticket submissions do not contain filter wrappers.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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