CVE-2026-16957: Slim SEO (WordPress plugin) · Insecure Direct Object Reference
Affects Slim SEO (WordPress plugin)Source CVE Database V5
Not known to be exploited · CVSS 2.7 Low : upgrade to 4.9.11 when convenient.
Data as of 8 Nov 2026, 23:24 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 4.9.11
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 9 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.
What to do
Upgrade Slim SEO (WordPress plugin) to 4.9.11.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Slim SEO | Affected
| Fixed in
|
AI-suggested
If you cannot patch yet, restrict Contributor role permissions or limit access to the Slim SEO plugin features to trusted users only.
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.