CVE-2025-0825

CRLF injection in Cpp-httplib

State: Published
Severity: 6.9 Medium
Published: Feb 4, 2025
Updated: May 23, 2025
Reserved: Jan 29, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N	Checkmarx

Weaknesses

CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

Affected Products

Product	Versions
cpp-httplib	v0.17.3 through v0.18.3Affected

References

https://github.com/yhirose/cpp-httplib/commit/9c36aae4b73e2b6e493f4133e4173103c9266289patch
https://advisory.checkmarx.net/advisory/CVE-2025-0825/

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.