---
id: "CVE-2023-54423"
page: "https://infrastack.ai/live/CVE-2023-54423"
kind: "vulnerability"
aliases: ["CVE-2023-54423"]
title: "OpenMage magento-lts: stored XSS through TinyMCE editor lets scripts run"
severity: "high"
cvss: 8.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["magento-lts", "openmage", "package", "php", "self-hosted"]
not_affected_if: ["no-tinymce-wysiwyg", "version-20.2.0-or-later"]
published_at: "2026-11-13T10:17:23+00:00"
first_seen_at: "2026-11-13T10:47:09+00:00"
updated_at: "2026-11-13T10:51:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54423", "first_seen_at": "2026-11-13T10:47:09+00:00"}]
exploit_sources: []
---

# OpenMage magento-lts: stored XSS through TinyMCE editor lets scripts run

Link for people: https://infrastack.ai/live/CVE-2023-54423 (this .md is for agents)

OpenMage magento-lts before 20.2.0 has a stored cross-site scripting flaw because the TinyMCE WYSIWYG editor does not filter scripts in crafted HTML tags. An attacker can inject an img element with a malicious onmouseover attribute that runs script in the browsers of users who view the rendered content.

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

## How to check

- Check the installed magento-lts / OpenMage version and compare it with `20.2.0`
- Review stored WYSIWYG content for img tags with onmouseover attributes
- Confirm whether TinyMCE WYSIWYG editing is enabled for admin or content editors

## Fix

- OpenMage magento-lts: move to `20.2.0` or later

## Timeline

- 2026-11-13T10:47:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-54423

## Documents

- [advisory] Vendor advisory: github.com https://github.com/OpenMage/magento-lts/security/advisories/GHSA-9j5w-2cqc-cwj9
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.2.0-stored-xss-via-tinymce-wysiwyg-editor

## From the sources

OpenMage magento-lts before 20.2.0 contains a stored cross-site scripting vulnerability because the TinyMCE WYSIWYG editor fails to filter scripts in specially crafted HTML tags. Attackers can inject an img element with a malicious onmouseover attribute to execute scripts in the browsers of users viewing the rendered content.

---

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