CVE & CISA-KEV Catalog

CVE-2025-66577

MEDIUM
5.3
CVSS v3
NVD

Description

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can supply X-Forwarded-For or X-Real-IP headers which get accepted unconditionally by get_client_ip() in docker/main.cc, causing access and error logs (nginx_access_logger / nginx_error_logger) to record spoofed client IPs (log poisoning / audit evasion). This vulnerability is fixed in 0.27.0.

CWE-117CWE-807

How to fix

Remediation Available
cpp-httplibDebian
Fixed in:0.41.0+ds-3CVE-2025-66577

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityLow
AvailabilityNone

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

Exploit Intelligence

0.24%probability of exploitation in 30 days
15thpercentile

Low risk: more likely to be exploited than 15% of all known CVEs.

References

Exploit1

Related Vulnerabilities

Other CWE-117 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2021-43410Medium5.32.4%-Fix
CVE-2022-32549Medium5.32.3%--
CVE-2019-14864Medium6.51.9%-Fix
CVE-2021-42250Medium6.51.8%-Fix
CVE-2024-47083High7.51.6%--
CVE-2020-25646High7.51.4%--
Embed a live status badge for CVE-2025-66577
CVE-2025-66577 severity badge

Markdown

[![CVE-2025-66577](https://tridentstack.com/cve/badge/CVE-2025-66577.svg)](https://tridentstack.com/cve/CVE-2025-66577)

HTML

<a href="https://tridentstack.com/cve/CVE-2025-66577"><img src="https://tridentstack.com/cve/badge/CVE-2025-66577.svg" alt="CVE-2025-66577"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it worksStart freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-11.