CVE-2020-24613: wolfSSL

Medium severity, CVSS 6.8. EPSS: 0.9% chance of exploitation in the next 30 days.

wolfSSL before 4.5.0 mishandles TLS 1.3 server data in the WAIT_CERT_CR state, within SanityCheckTls13MsgReceived() in tls13.c. This is an incorrect implementation of the TLS 1.3 client state machine. This allows attackers in a privileged network position to completely impersonate any TLS 1.3 servers, and read or modify potentially sensitive information between clients using the wolfSSL library and these TLS servers.

Affected products

• wolfSSL wolfSSL: before 4.5.0 (fixed in 4.5.0)

Published 2020-08-24. Last modified 2026-06-17.