Path Traversal in Sslzen SSL Zen — Certificate Installer & HTTPS Redirects

CVE-2026-17602

The SSL Zen — SSL Certificate Installer & HTTPS Redirects plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 4.7.42 via the 'file_name' parameter parameter. This makes it possible for authenticated attackers, with administrator-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information.

Vulnerability class: Path Traversal (Directory Traversal)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-17602?
CVE-2026-17602 is a medium-severity vulnerability in Sslzen SSL Zen — Certificate Installer & HTTPS Redirects, classified under Path Traversal. CVSS score: 4.9/10. Published 2026-09-25.
How severe is CVE-2026-17602?
Medium severity. CVSS v3 base score is 4.9 out of 10.