CVE-2026-64637: CWE-269 Improper Privilege Management in WebPros Plesk
Improper privilege management in the XML-RPC API of Plesk before 18.0.80, allows an authenticated reseller to obtain an administrative session for the root user account.
AI Analysis
Technical Summary
This vulnerability in Plesk's XML-RPC API allows an authenticated reseller account to bypass intended privilege restrictions and gain administrative access with root-level permissions. The flaw is due to improper privilege management (CWE-269) and affects versions prior to 18.0.80. The CVSS 3.0 base score is 9.9, indicating critical severity with network attack vector, low attack complexity, and no user interaction required. The vulnerability impacts confidentiality, integrity, and availability at a high level.
Potential Impact
An authenticated reseller can escalate privileges to root administrative level, potentially leading to full system compromise including unauthorized access, modification, and disruption of services managed by Plesk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented in the provided data. Until a patch is available, restrict reseller access and monitor for suspicious activity related to XML-RPC API usage.
CVE-2026-64637: CWE-269 Improper Privilege Management in WebPros Plesk
Description
Improper privilege management in the XML-RPC API of Plesk before 18.0.80, allows an authenticated reseller to obtain an administrative session for the root user account.
CVSS v3.0
Score 9.9critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Plesk's XML-RPC API allows an authenticated reseller account to bypass intended privilege restrictions and gain administrative access with root-level permissions. The flaw is due to improper privilege management (CWE-269) and affects versions prior to 18.0.80. The CVSS 3.0 base score is 9.9, indicating critical severity with network attack vector, low attack complexity, and no user interaction required. The vulnerability impacts confidentiality, integrity, and availability at a high level.
Potential Impact
An authenticated reseller can escalate privileges to root administrative level, potentially leading to full system compromise including unauthorized access, modification, and disruption of services managed by Plesk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented in the provided data. Until a patch is available, restrict reseller access and monitor for suspicious activity related to XML-RPC API usage.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- hackerone
- Date Reserved
- 2026-07-20T15:00:00.696Z
- Cvss Version
- 3.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a762368bf8831d539ed4438
Added to database: 08/07/2026, 18:26:48 UTC
Last enriched: 08/07/2026, 18:41:05 UTC
Last updated: 08/07/2026, 22:42:04 UTC
Views: 7
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