Vulnerability · Published Feb 4, 2025 · Assigned by Checkmarx
CVE-2025-0825CRLF injection in Cpp-httplib
Medium 6.9
In plain English
A medium-severity security flaw in cpp-httplib. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)6.9Medium
Exploit odds (30 days)0.4%top 64.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | cpp-httplib | no fix listed | DEBIAN-CVE-2025-0825 |
| Debian:13 | cpp-httplib | 0.18.7-1 | DEBIAN-CVE-2025-0825 |
| Debian:14 | cpp-httplib | 0.18.7-1 | DEBIAN-CVE-2025-0825 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| cpp-httplib | v0.17.3 – through v0.18.3 |
Weakness: CWE-113 · Vector: 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