CVE-2025-27400: Magento LTS vulnerable to stored XSS in theme config fields

CVE-2025-27400 · Severity: low · CVSS 3.1 · Published 2025-03-03

Magento LTS vulnerable to stored XSS in theme config fields

Technologies: openmage/magento-lts (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2025-27400 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-27400 being exploited in the wild.
How severe is CVE-2025-27400?
Low severity, with a CVSS score of 3.1, published 3 March 2025.
Which products and versions are affected?
openmage/magento-lts (Packagist) ECOSYSTEM:introduced=0,fixed=20.12.3.
Is there a fix for CVE-2025-27400?
Yes. openmage/magento-lts (Packagist): upgrade to 20.12.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-27400?
Check whether you run openmage/magento-lts (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • openmage/magento-lts (Packagist): upgrade to 20.12.3 or later
    composer require openmage/magento-lts:^20.12.3

Affected products

  • openmage/magento-lts (Packagist) ECOSYSTEM:introduced=0,fixed=20.12.3

Identifiers

  • CVE-2025-27400
  • GHSA-5pxh-89cx-4668

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.