CVE-2021-36023: Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by

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CRITICAL 9.1UPGRADE

CVE-2021-36023 is a critical-severity flaw (CVSS 9.1) affecting magento. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by an XML Injection vulnerability in the Widgets Update Layout. An attacker with admin privileges can trigger a specially crafted script to achieve remote code execution.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-78
Published	2023-09-06
Last modified	2026-06-17

Publisher (CNA): Adobe Systems Incorporated · Vendor: magento

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-09-06 14:15 UTCPublished CVE record published
2026-06-17 03:58 UTCUpdated Record last modified

magento magento UPGRADE

Affected: < 2.3.7 · >= 2.4.0 and < 2.4.2 · 2.3.7 · 2.4.2 · 2.4.2 p1

Fixed in: 2.3.7, 2.4.2

Safe to downgrade to: a release before 2.3.7

1. Check installed version

apt-cache policy magento || rpm -q magento || magento --version

2. UPGRADE to 2.3.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade magento

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade magento

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.3.7 (Debian / Ubuntu)

apt-cache madison magento sudo apt install magento=<VERSION_BEFORE_2.3.7> sudo apt-mark hold magento

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list magento sudo dnf downgrade magento-<VERSION_BEFORE_2.3.7> sudo dnf versionlock add magento

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-36023?

magento: upgrade to 2.3.7, 2.4.2. Exact commands for each OS are on this page.

Is CVE-2021-36023 being exploited?

CVE-2021-36023 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-36023 affect?

CVE-2021-36023 affects magento. Severity is critical (CVSS 9.1). Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by an XML Injection vulnerability in the Widgets Update Layout. An attacker with admin privileges can trigger a specially crafted scr

How urgent is CVE-2021-36023?

Priority 53/100. Critical severity

Software pages

Magento vulnerabilities

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References

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