WHMCS
- Software type
- Business application
- Total vulnerabilities (90 days)
- 2
- Products & ServicesProducts & Services
- SolutionsSolutions
- PricingPricing
- CompanyCompany
- ResourcesResources
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As of 11/07/2026, WHMCS recorded 2 security vulnerabilities in the last 90 days, of which 2 are rated High or Critical. None of these vulnerabilities is actively exploited (KEV) according to CISA's catalog. CyStack recommends that organizations and individual users apply patches as soon as possible.
CyStack does not yet have sufficient official-source data to identify the latest version of WHMCS and determine which vulnerabilities affect that version.
CyStack VulnScan continuously discovers assets, validates vulnerabilities, and helps security teams prioritize remediation across the organization.
CVE-2026-67399Unsafe Deserialization Enables Unauthenticated Remote Code Execution in WebPros WHMCSCVE-2026-67398Missing authorization in the WebPros WHMCS 2Checkout payment gateway exposes customer dataCVE-2026-29204WebPros WHMCS Client Area IDOR enables cross-account access| Vulnerability | Exploitation status | Fix | Published | Severity |
|---|---|---|---|---|
CVE-2026-67399Unsafe Deserialization Enables Unauthenticated Remote Code Execution in WebPros WHMCS | Exploitation statusNot exploited | FixYes | Published09/14/2026 | SeverityCritical |
CVE-2026-67398Missing authorization in the WebPros WHMCS 2Checkout payment gateway exposes customer data | Exploitation statusNot exploited | FixYes | Published09/03/2026 | SeverityHigh |
CVE-2026-29204WebPros WHMCS Client Area IDOR enables cross-account access | Exploitation statusNot exploited | FixYes | Published05/12/2026 | SeverityCritical |
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