CVE-2021-28556: Magento Commerce DOM-based cross-site scripting (XSS) could lead to arbitrary javascript execution

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-28 · updated 2026-06-17
Weakness: CWE-79

Description

Magento versions 2.4.2 (and earlier), 2.4.1-p1 (and earlier) and 2.3.6-p1 (and earlier) are affected by a DOM-based Cross-Site Scripting vulnerability on mage-messages cookies. Successful exploitation could lead to arbitrary JavaScript execution by an unauthenticated attacker. User interaction is required for successful exploitation.

Affected products

Adobe Magento Commerce: before 2.3.7; from 2.4.0 through 2.4.2 — fixed in 2.3.7

How to fix

Upgrade to a fixed version: Adobe Magento Commerce 2.3.7. Check the vendor advisory for mitigations.

References

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