CVE-2026-128028
OpenMage magento-lts before 20.18.2 Stored XSS via Product Custom Option SVG Upload
CVSS Score
4.7
EPSS Score
0.0%
EPSS Percentile
0th
OpenMage magento-lts before 20.18.2 and 21.0.0-beta1 before 21.0.0-beta3 contains a stored cross-site scripting vulnerability in Mage_Catalog_Model_Product_Option_Type_File, which accepts guest SVG, XHTML, or XML uploads through product File custom options with an empty allowed-extension list. Unauthenticated attackers can send the file URL under media/custom_options/ to victims, executing script in the store origin and exposing administrator sessions when the admin panel shares that origin.
| CWE | CWE-79 |
| Vendor | openmage |
| Product | magento-lts |
| Published | Nov 13, 2026 |
Stay Ahead of the Next One
Get instant alerts for openmage magento-lts
Be the first to know when new medium vulnerabilities affecting openmage magento-lts are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
OpenMage / magento-lts
0 < 20.18.2
OpenMage / magento-lts
21.0.0-beta1 < 21.0.0-beta3
References
github.com: https://github.com/OpenMage/magento-lts/security/advisories/GHSA-v7mx-rv47-452m github.com: https://github.com/OpenMage/magento-lts/commit/5b6f985785245a964aa3dc78609f6af44d9d5e27 github.com: https://github.com/OpenMage/magento-lts/commit/dd692b825ba50f196bcc20ae67fbed48dd95da56 github.com: https://github.com/OpenMage/magento-lts/commit/5896b2a60b10e892cec594391b2612ab53a4ce59 vulncheck.com: https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.18.2-stored-xss-via-product-custom-option-svg-upload
Credits
colinmollenhour