What’s Vulnerable › Vulnerabilities
CVE-2026-16957: Slim SEO < 4.9.11 - Contributor+ Arbitrary Post Meta Disclosure
- Severity: low (CVSS 2.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-09 · updated 2026-08-26
- Weakness: CWE-639
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.
Affected products
- Slim SEO: before 4.9.11 — fixed in 4.9.11
How to fix
Upgrade to a fixed version: Slim SEO 4.9.11. Check the vendor advisory for mitigations.
References
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