Auth bypass in SSL Zen — Certificate Installer & HTTPS Redirects

CVE-2026-86781

The SSL Zen — SSL Certificate Installer & HTTPS Redirects WordPress plugin before 4.7.40 does not perform capability or nonce checks on a certificate-file download routine that runs early in the WordPress admin request lifecycle, allowing any authenticated user, including Subscribers, to download the site's TLS private key, certificates, and diagnostic logs.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (7.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-86781: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

  • SSL Zen — Certificate Installer & HTTPS Redirects

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-86781?
CVE-2026-86781 is a medium-severity vulnerability in SSL Zen — Certificate Installer & HTTPS Redirects, classified under Improper Authentication. CVSS score: 5.3/10. Published 2026-09-11.
How severe is CVE-2026-86781?
Medium severity. CVSS v3 base score is 5.3 out of 10.