---
id: "CVE-2026-124412"
page: "https://infrastack.ai/live/CVE-2026-124412"
kind: "vulnerability"
aliases: ["CVE-2026-124412"]
title: "Slim SEO WordPress plugin: stored XSS via script tags in web pages"
severity: "medium"
cvss: 4.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["other", "slim-seo", "wordpress"]
not_affected_if: []
published_at: "2026-11-13T15:17:36+00:00"
first_seen_at: "2026-11-13T15:46:16+00:00"
updated_at: "2026-11-13T15:50:09+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124412", "first_seen_at": "2026-11-13T15:46:16+00:00"}]
exploit_sources: []
---

# Slim SEO WordPress plugin: stored XSS via script tags in web pages

Link for people: https://infrastack.ai/live/CVE-2026-124412 (this .md is for agents)

Slim SEO by eLightUp has a basic cross-site scripting flaw that lets script tags be injected into web pages. An attacker who can supply that content can run JavaScript in a visitor's browser.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether the Slim SEO plugin (slim-seo) is installed and its version, which the sources say is affected through `4.11.5`

## Timeline

- 2026-11-13T15:46:16+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124412

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_