What is GHSA-27h3-c9gv-83jx?

GHSA-27h3-c9gv-83jx is a security advisory published by GitHub Security Advisories with Critical severity. Improper privilege management in the XML-RPC API of Plesk before 18.0.80, allows an authenticated...

Which CVE IDs does GHSA-27h3-c9gv-83jx cover?

GHSA-27h3-c9gv-83jx covers the following CVE IDs: CVE-2026-64637. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-27h3-c9gv-83jx?

GHSA-27h3-c9gv-83jx has a CVSS v3 base score of 9.9, published by GitHub Security Advisories.

GHSA-27h3-c9gv-83jxCriticalCVSS 9.9

Improper privilege management in the XML-RPC API of Plesk before 18.0.80, allows an authenticated...

Vendor

GitHub Security Advisories

Published

August 7, 2026

Last Modified

August 7, 2026

🔗 CVE IDs covered (1)

CVE-2026-64637 →

📋 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.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-64637
https://support.plesk.com/hc/en-us/articles/42432168683799
https://github.com/advisories/GHSA-27h3-c9gv-83jx