What is CVE-2026-15463?

CVE-2026-15463 is a medium-severity vulnerability in Sslzen SSL Zen — Certificate Installer & HTTPS Redirects, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-19.

How severe is CVE-2026-15463?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Sslzen SSL Zen — Certificate Installer & HTTPS Redirects

CVE-2026-15463

The SSL Zen — SSL Certificate Installer & HTTPS Redirects plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'host' parameter in all versions up to, and including, 4.7.42 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The vulnerability is only exploitable when in the system_requirements stage.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Sslzen Ssl Zen — Certificate Installer & Https Redirects

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-15463?: CVE-2026-15463 is a medium-severity vulnerability in Sslzen SSL Zen — Certificate Installer & HTTPS Redirects, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-19.
How severe is CVE-2026-15463?: Medium severity. CVSS v3 base score is 6.1 out of 10.