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Low

Magento LTS vulnerable to stored XSS in theme config fields

  • Disclosed: 03.03.2025
  • Updated: 11.10.2026 10:22

As reported by Aakash Adhikari, Github: @justlife4x4, the Design > Themes > Skin (Images / CSS) config field allows a Stored XSS when it contains an end script tag.

Impact

A malicious user with access to this configuration field could use a Stored XSS to affect other authenticated admin users in the admin panel.

The attack requires an admin user with configuration access, so in practice, it is not very likely to be used for gaining elevated privileges, although it could theoretically be used to impersonate other users.

image

Affected software

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PlatformPackageVulnerable versionsFixed in
Composer package openmage/magento-lts < 20.12.3 20.12.3

References

CVSS score 2.9/10
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:L
Weakness (CWE)
CWE-79
Platform
Composer
Package
openmage/magento-lts
Disclosed
03.03.2025
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-5pxh-89cx-4668 - CC BY 4.0

Vulnerability history: openmage/magento-lts

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (26) in the archive
Total entries
26
First → latest
08.2020 05.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 3
  • High 12
  • Medium 10
  • Low 1

Disclosures per year

Severity:
  1. Magento LTS has Weak API Session ID — Predictable MD5 of Time-Derived Inputs
    Critical CVE-2026-42155 < 20.18.0 20.18.0
  2. OpenMage LTS: Customer File Upload Extension Blocklist Bypass → Remote Code Execution
    High · 8.8 CVE-2026-40488 < 20.17.0 20.17.0
  3. OpenMage LTS: Phar Deserialization leads to Remote Code Execution
    High · 8.1 CVE-2026-25524 < 20.17.0 20.17.0
  4. Magento LTS vulnerable to stored XSS in theme config fields this entry
    Low · 2.9 CVE-2025-27400 < 20.12.3 20.12.3
  5. Magento LTS vulnerable to Stored XSS via TinyMCE WYSIWYG Editor
    High · 7.5 ghsa-9j5w-2cqc-cwj9 < 20.2.0 20.2.0
  6. Magento LTS's guest order "protect code" can be brute-forced too easily
    High · 7.5 CVE-2023-41879 < 19.5.1, >= 20.0.0, < 20.1.1 19.5.1, 20.1.1
  7. DataFlow upload remote code execution vulnerability
    High · 7.2 CVE-2021-41231 < 19.4.22, >= 20.0.0, < 20.0.19 19.4.22, 20.0.19
  8. Fix for authenticated remote code execution through layout update
    High · 8.8 CVE-2021-41144 < 19.4.22, >= 20.0.0, < 20.0.19 19.4.22, 20.0.19
  9. Fix for arbitrary file deletion in customer media allows for remote code execution
    High · 7.2 CVE-2021-41143 < 19.4.22, >= 20.0.0, < 20.0.19 19.4.22, 20.0.19
  10. Fix for arbitrary command execution in custom layout update through blocks
    High · 7.2 CVE-2021-39217 < 19.4.22, >= 20.0.0, < 20.0.19 19.4.22, 20.0.19
  11. Layout XML Arbitrary Code Fix
    High CVE-2021-32758 < 19.4.15, >= 20.0.0, < 20.0.13 19.4.15, 20.0.13
  12. Data Flow Sanitation Issue Fix
    High CVE-2021-32759 < 19.4.15, >= 20.0.0, < 20.0.13 19.4.15, 20.0.13
  13. Backport for CVE-2021-21024 Blind SQLi from Magento 2
    Critical · 9.1 CVE-2021-21427 < 19.4.13, >= 20.0.0, < 20.0.9 19.4.13, 20.0.9
  14. Fixes a bug in Zend Framework's Stream HTTP Wrapper
    Critical · 9.8 CVE-2021-21426 < 19.4.13, >= 20.0.0, < 20.0.9 19.4.13, 20.0.9
  15. RCE via PHP Object injection via SOAP Requests
    High · 8.0 CVE-2020-15244 < 19.4.8, >= 20.0.0, < 20.0.4 19.4.8, 20.0.4
  16. Observable Timing Discrepancy in OpenMage LTS
    High · 8.0 CVE-2020-15151 < 19.4.6, >= 20.0.0, < 20.0.2 19.4.6, 20.0.2

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