CVE-2025-0825

6.9 mediumEPSS 0.4%

Medium (6.9) in yhirose cpp-httplib. 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.

Severity

CVSS 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

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 35% of CVEs (scores of 2026-10-31)
CWE: CWE-113
Published: 2025-02-04
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

yhirose:cpp-httplib

References

https://advisory.checkmarx.net/advisory/CVE-2025-0825/
https://github.com/yhirose/cpp-httplib/commit/9c36aae4b73e2b6e493f4133e4173103c9266289

Check your stack JSON