CVE-2017-18438: cPanel

Medium severity, CVSS 6.3. EPSS: 0.8% chance of exploitation in the next 30 days.

cPanel before 64.0.21 allows demo accounts to execute code via Encoding API calls (SEC-242).

Affected products

• cPanel cPanel: from 55.9999.61, before 56.0.49 (fixed in 56.0.49); from 57.9999.48, before 58.0.49 (fixed in 58.0.49); from 59.9999.58, before 60.0.43 (fixed in 60.0.43); from 61.9999.55, before 62.0.24 (fixed in 62.0.24); from 63.9999.74, before 64.0.21 (fixed in 64.0.21)

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