CVE-2025-0825

Publication date 4 February 2025

Last updated 23 February 2026

Ubuntu priority

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
cpp-httplib	25.10 questing	Not affected
	25.04 plucky	Ignored end of life, was needs-triage
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Vulnerable
	22.04 LTS jammy	Vulnerable
	20.04 LTS focal	Not in release

How can I get the fixes?
What do statuses mean?
Patch details

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
cpp-httplib	Upstream: 9c36aae

References

MITRE
NVD
Launchpad
Debian

Other references

https://www.cve.org/CVERecord?id=CVE-2025-0825
https://github.com/yhirose/cpp-httplib/commit/9c36aae4b73e2b6e493f4133e4173103c9266289