Possible Reflected XSS via cPanel cpanelwebcall Endpoint CVE-2023-29489

ATT&CK techniques

Initial Access → Execution

Recon
Resource Dev
Initial Access
- T1190Exploit Public-Facing Application
Execution
- T1059.007JavaScript
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects HTTP requests to the cPanel /cpanelwebcall/ path that contain reflected cross-site scripting payload markers. CVE-2023-29489 allows unauthenticated reflected XSS on cPanel management ports as documented by Assetnote, which attackers use to hijack sessions and pivot into hosting infrastructure.

Reporting behind it

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Possible Reflected XSS via cPanel cpanelwebcall Endpoint CVE-2023-29489

Pivot detection · T1059.007 · 9 related

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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