CVE-2026-124412

WordPress Slim SEO plugin <= 4.11.5 - Content Injection vulnerability

Medium 4.3

Description

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in eLightUp Slim SEO slim-seo allows Code Injection.This issue affects Slim SEO: from n/a through 4.11.5.

Key facts

Published: 13 Nov 2026
Last changed: 13 Nov 2026
Assigned by: Patchstack
EPSS: 0.268% likely to be exploited in the next 30 days, higher than 19.074% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: none; Automatable: no; Technical impact: partial

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

4.3CVSS 3.1, Mediumfrom the CNA (Patchstack)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

What to do

Update the WordPress Slim SEO plugin to the latest available version (at least 4.11.6).CNA solution statement

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

Code Injection (CNA impact statement)

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
eLightUp	Slim SEO	Default status: unaffected 0 up to and including 4.11.5 (affected); at 4.11.6 unaffected

Timeline

13 Nov 2026 Published

Weakness

CWE-80

References

patchstack.comvdb-entry