CVE-2026-93029 cPanel CVE debrief

Who should care

WHM administrators and users with unprivileged accounts should assess exposure and update to patched versions to prevent potential administrative actions by attackers. WHM administrators should review the current version and exposure to ensure the security of their systems. Unprivileged account holders should be aware of the potential risks and take necessary precautions to prevent exploitation. The vulnerability can be mitigated by updating to the patched

Why it matters

WHM administrators and users should update to patched versions to prevent potential administrative actions by attackers through stored XSS exploitation.

• Potential execution of administrative actions as WHM administrators
• Elevation of privileges for unprivileged account holders
• Possible disruption of WHM administrative functions
• Need for verification of current version and exposure

Technical summary

The vulnerability allows an unprivileged account holder to execute script in the context of a WHM administrator's session, which can be used to perform administrative actions as that user. The vulnerability is caused by inadequate input validation and sanitization in the WHM Manage SSL Hosts interface. The patched versions address this issue by implementing proper input validation and sanitization. The vulnerability has a high impact on the confidentiality, integrity, and availability of the affected system. The vulnerability requires a patch to fix.

Defensive priority

Update to the latest patched version: 11.110.0.148 or later, 11.134.0.61 or later, 11.136.0.45 or later, 11.138.0.11 or later, or WP2: 11.138.1.13 or later.

Recommended defensive actions

• Update cPanel/WHM to version 11.110.0.148 or later
• Update cPanel/WHM to version 11.134.0.61 or later
• Update cPanel/WHM to version 11.136.0.45 or later
• Update cPanel/WHM to version 11.138.0.11 or later
• Update cPanel/WHM to WP2 version 11.138.1.13 or later

Evidence notes

The CVE record and source item metadata indicate a stored XSS vulnerability in WHM's Manage SSL Hosts interface. The vendor, cPanel, has provided patched versions for cPanel/WHM. The vulnerability allows an unprivileged account holder to execute script in the context of a WHM administrator's session. The vulnerability is rated as critical and requires immediate attention. The patched versions are 11.110.0.148 or later, 11.134.0.61 or later, 11.136.0.45 or later, 11.138.0.11 or later, and WP2: 11.138.1.13 or later.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.