CVE-2017-18393: cPanel

Low severity, CVSS 2.7. EPSS: 0.7% chance of exploitation in the next 30 days.

cPanel before 68.0.15 does not block a username of postmaster, which might allow reception of private e-mail (SEC-326).

Affected products

• cPanel cPanel: from 61.9999.55, before 62.0.35 (fixed in 62.0.35); from 63.9999.74, before 64.0.42 (fixed in 64.0.42); from 65.9999.38, before 66.0.34 (fixed in 66.0.34); from 67.9999.64, before 68.0.15 (fixed in 68.0.15)

Published 2019-08-02. Last modified 2026-06-17.