CVE-2019-19271: ProFTPD

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

An issue was discovered in tls_verify_crl in ProFTPD before 1.3.6. A wrong iteration variable, used when checking a client certificate against CRL entries (installed by a system administrator), can cause some CRL entries to be ignored, and can allow clients whose certificates have been revoked to proceed with a connection to the server.

Affected products

• ProFTPD ProFTPD: before 1.3.6 (fixed in 1.3.6)

Published 2019-11-26. Last modified 2026-06-17.