CVE-2021-21019: Magento XML injection in the Widgets module

critical Affects magento/community-edition. Feed 2026.10.29.1, updated 2026-10-28; published 2022-05-24; advisory modified 2024-02-16.

Magento XML injection in the Widgets module

Package: magento/community-edition Composer
Affected versions: <2.3.6-p1 or >=2.4.0 and <2.4.1-p1
Fixed in: 2.3.6-p1, 2.4.1-p1
Severity: critical CVSS 9.1
Exploitation: not on CISA KEV · EPSS 4% (89.5th percentile)
Published: 2022-05-24
Source: osv.dev

References

CWE-91

NVD record magento/community-edition advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden deps composer.lock

# or, without Composer
pipx install phpwarden   &&   phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs How findings are ranked

Related advisories

CVE-2024-34102 KEV critical Magento Open Source affected by an Improper Restriction of XML External Entity Reference ( same package: magento/community-edition
CVE-2022-24086 KEV critical Magento improper input validation vulnerability same package: magento/community-edition
CVE-2025-54236 KEV critical Magento Community Edition Improper Input Validation vulnerability same package: magento/community-edition
CVE-2021-21029 medium Magento Reflected Cross-site Scripting vulnerability via 'file' parameter same package: magento/community-edition
CVE-2022-34258 medium Magento stored Cross-Site Scripting (XSS) vulnerability same package: magento/community-edition
CVE-2023-22249 medium Magento Open Source allows Cross-Site Scripting (XSS) same package: magento/community-edition