CVE-2025-27400 json
Magento vulnerable to stored XSS in theme config fields
published last yr. modified 4mo ago also EUVD-2025-5563 , GHSA-5pxh-89cx-4668
- cvss
- 2.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 17%
- public exploits
- 0
- none known
Summary
Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Versions prior to 20.12.3 and 20.13.0 contain a vulnerability that allows script execution in the admin panel which could lead to cross-site scripting against authenticated admin users. The attack requires an admin user with configuration access, so in practicality it is not very likely to be useful given that a user with this level of access is probably already a full admin. Versions 20.12.3 and 20.13.0 contain a patch for the issue.
Patch / fix
- packagist openmage/magento-lts 20.12.3
- openmage magento 20.12.3
- openmage openmage 20.12.3
Is CVE-2025-27400 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 2.9 | CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:L |
| GitHub | 3.1 | 2.9 | CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | openmage/magento-lts | <20.12.3 |
20.12.3 |
Affected products
- OpenMage magento-lts
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/OpenMage/magento-lts/commit/d307e5bf75729a2347dde0952fe9fd9fcd9c6aea
web
-
github.com
/OpenMage/magento-lts/security/advisories/GHSA-5pxh-89cx-4668
web
-
github.com
/OpenMage/magento-lts/releases/tag/v20.12.3
web
-
github.com
/OpenMage/magento-lts/releases/tag/v20.13.0
web
-
nvd.nist.gov
/vuln/detail/CVE-2025-27400
advisory
-
github.com
/OpenMage/magento-lts
package
Sources
- CVE List CVE-2025-27400
- GitHub Advisory GHSA-5pxh-89cx-4668
- NVD CVE-2025-27400
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.