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CVE-2025-0825

Date: February 4, 2025

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 Score

Related Resources (5)

https://advisory.checkmarx.net/advisory/CVE-2025-0825/
https://github.com/yhirose/cpp-httplib/commit/9c36aae4b73e2b6e493f4133e4173103c9266289
https://nvd.nist.gov/vuln/detail/CVE-2025-0825
https://security-tracker.debian.org/tracker/CVE-2025-0825
https://www.mend.io/vulnerability-database/CVE-2025-0825

Severity Score

Weakness Type (CWE)

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

CWE-113

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

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