CVE-2026-16957 Details
Description
The Slim SEO WordPress plugin before 4.9.11 does not restrict a post-meta preview feature to posts the user is allowed to edit, verifying only read access, allowing users with the Contributor role to read arbitrary post meta, including protected and private keys, of published posts they do not own, including password-protected posts and posts of non-public post types.
A vulnerability in the Slim SEO WordPress plugin, affecting versions prior to 4.9.11, allows users with the Contributor role to access arbitrary post meta from published posts they do not own. The plugin's post-meta preview feature only verifies read access and does not restrict access to posts the user can edit. This flaw enables the disclosure of protected and private keys, including from password-protected posts and non-public post types.
Users are advised to update the Slim SEO WordPress plugin to version 4.9.11 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Aug 9, 2026CISA-ADP
Assessed Aug 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/08e8c64b-50a4-4865-a33d-275644dcb850/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Slim SEO | < 4.9.11 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 11, 2026 | CVE Modified | CISA-ADP |
| Aug 9, 2026 | New CVE Received | [email protected] |