CVE-2025-43918 (CVSS 6.4)

Description

SSL.com before 2025-04-19, when domain validation method 3.2.2.4.14 is used, processes certificate requests such that a trusted TLS certificate may be issued for the domain name of a requester's email address, even when the requester does not otherwise establish administrative control of that domain.

Is your site exposed to CVE-2025-43918?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

6.4

MEDIUM

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

Weakness Type (CWE)

CWE-348 CWE-348

References

Other References

https://bugzilla.mozilla.org/show_bug.cgi?id=1961406 https://news.ycombinator.com/item?id=43738485

Frequently Asked Questions

What is CVE-2025-43918? +

SSL.com before 2025-04-19, when domain validation method 3.2.2.4.14 is used, processes certificate requests such that a trusted TLS certificate may be issued for the domain name of a requester's email address, even when the requester does not otherwise establish administrative control of that domain. It has a CVSS v3.1 base score of 6.4 (MEDIUM).

How severe is CVE-2025-43918? +

CVE-2025-43918 has a CVSS v3.1 score of 6.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-43918? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-9561

Eclipse Kura versions prior to 5.6.2 trust the client-supplied X-Forwarded-For HTTP header as the authoritative source of the client IP …

CVE-2024-45410 9.8

Traefik is a golang, Cloud Native Application Proxy. When a HTTP request is processed by Traefik, certain HTTP headers such …

CVE-2026-44183 9.8

Cleanuparr is a tool for automating the cleanup of unwanted or blocked files in Sonarr, Radarr, and supported download clients …

CVE-2025-48865 9.1

Fabio is an HTTP(S) and TCP router for deploying applications managed by consul. Prior to version 1.6.6, Fabio allows clients …

CVE-2025-59951 9.1

Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. The official Docker image for …

CVE-2026-58122 9.1

Hermes WebUI before 0.51.307 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to circumvent local-origin IP restrictions on …

CVE-2025-43918