CVE ID: CVE-2026-56843
Published: July 8, 2026
Description: Incorrect authorization in the XML-RPC API of WebPros Plesk before 18.0.78.4 allows a low-privileged authenticated customer to look up domains they do not own, because ownership is enforced only for certain lookup filters and schema validation is bypassed for legacy protocol versions. This results in cross-tenant disclosure of other tenants' FTP credentials stored in cleartext, which can be leveraged to execute code as another tenant's system user.
Severity: 9.9 | CRITICAL
More Information:
https://cvefeed.io/vuln/detail/CVE-2026-56843
CVE-2026-56843 - WebPros Plesk XML-RPC API Incorrect Authorization Vulnerability
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Starburst-David
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- Joined: Wed Feb 11, 2026 8:31 pm