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CVE-2025-27400VulnerabilityPublished Updated

CVE-2025-27400: OpenMage magento-lts · Cross-site Scripting

Affects OpenMage magento-ltsSource CVE Database V5

0

Not known to be exploited · CVSS 2.9 Low : upgrade to 20.12.3 when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
2.9Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 17% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 20.12.3
CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Feb 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Upgrade openmage/magento-lts to 20.12.3.

Affected software

ProductAffectedFixed in
GitHubopenmage/magento-ltspkg:github/openmage/magento-ltsOther threatsAffected
  • <20.12.3
Fixed in
  • 20.12.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate this vulnerability, European organizations should promptly upgrade OpenMage Magento-LTS installations to version 20.12.3 or later, where the issue is patched. In addition, organizations should enforce strict access controls to limit the number of users with admin configuration privileges, applying the principle of least privilege. Implement multi-factor authentication (MFA) for all admin accounts to reduce the risk of credential compromise. Conduct regular audits of admin user activities and monitor for unusual behavior indicative of exploitation attempts. Employ web application firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting the admin panel. Additionally, sanitize and validate all inputs in custom modules or extensions to prevent similar injection flaws. Finally, educate administrators about phishing and social engineering risks that could lead to credential theft and subsequent exploitation of this vulnerability.

Description

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.

References

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