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

Source: https://junglewise.ai/threats/cve-2025-27400-magento-lts-vulnerable-to-stored-xss-in-theme-config-fields  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-03-03  
License: CC BY 4.0 with a link back

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)](https://junglewise.ai/threats/technologies/openmage-magento-lts). Vendors: [Packagist](https://junglewise.ai/threats/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

  ```sh
  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

## Related threats

- [OpenMage Magento LTS reflected XSS in Dataflow Profiles](https://junglewise.ai/threats/cve-2026-42458-openmage-magento-lts-reflected-xss-in-dataflow-profiles)
- [OpenMage Magento LTS open redirect in stockAction controller](https://junglewise.ai/threats/cve-2026-42207-openmage-magento-lts-open-redirect-in-stockaction-controller)
- [OpenMage Magento LTS predictable API session ID generation](https://junglewise.ai/threats/cve-2026-42155-openmage-magento-lts-predictable-api-session-id-generation)
- [OpenMage LTS: Customer File Upload Extension Blocklist Bypass → Remote Code Execution](https://junglewise.ai/threats/cve-2026-40488-openmage-lts-customer-file-upload-extension-blocklist-bypass)
- [OpenMage LTS: Cross-user wishlist import leads to private option & file disclosure](https://junglewise.ai/threats/cve-2026-40098-openmage-lts-cross-user-wishlist-import-leads-to-private-option)