CVE-2025-0825

CRLF injection in Cpp-httplib

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.

References

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

Frequently Asked Questions

What is the severity of CVE-2025-0825?: CVE-2025-0825 has been scored as a medium severity vulnerability.
How to fix CVE-2025-0825?: To fix CVE-2025-0825, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-0825 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-0825 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-0825?: CVE-2025-0825 affects .

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Description

Category

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

References

Frequently Asked Questions