CVE-2025-0825: Yhirose Cpp-Httplib

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

cpp-httplib version v0.17.3 through v0.18.3 fails to filter CRLF characters ("\r\n") when those are prefixed with a null byte. This enables attackers to exploit CRLF injection that could further lead to HTTP Response Splitting, XSS, and more.

Affected products

• Yhirose Cpp-Httplib: from 0.17.3, before 0.18.4 (fixed in 0.18.4)

Published 2025-02-04. Last modified 2026-06-17.