How severe is CVE-2021-36043?

CVE-2021-36043 has a CVSS score of 6.6/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2021-36043?

CVE-2021-36043 affects the following packages: magento/project-community-edition (Packagist), magento/community-edition (Packagist), magento/community-edition (Packagist), magento/community-edition (Packagist), magento/community-edition (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2021-36043?

A fix is available for CVE-2021-36043; check the affected-versions list above or the advisory for the patched release of magento/project-community-edition, then make sure no transitive dependency still pins the vulnerable range.

How do I detect CVE-2021-36043 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for magento/project-community-edition, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2021-36043 if there is no patch (or I can't update yet)?

Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Is CVE-2021-36043 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-36043 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2021-36043?

CVE-2021-36043 has an EPSS (Exploit Prediction Scoring System) score of 1.9%, placing it in the 80th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2021-36043?

CVE-2021-36043 is classified as Server-Side Request Forgery (SSRF) (CWE-918). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2021-36043 published, and has it been updated?

CVE-2021-36043 was published on September 1, 2021 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘

🐘 Packagist

Not in CISA KEV

MEDIUM severity

CVE-2021-36043 — project-community-edition

MEDIUM

CVE-2021-36043 is a medium-severity (CVSS 6.6) Server-Side Request Forgery (SSRF) vulnerability in magento/project-community-edition. A fix is available for magento/project-community-edition — see the affected versions and patch details below.

Magento affected by a blind SSRF vulnerability in the bundled dotmailer extension

Also known asGHSA-36xq-7w8w-xp68

Published

Sep 1, 2021

Updated

Oct 24, 2026

Affected

5 pkgs

Patched

2 / 5

Exploits

None indexed

Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.9%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs80th percentile — riskier than 80% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

5 pkgs affected

🐘magento/project-community-edition🐘magento/community-edition🐘magento/community-edition🐘magento/community-edition🐘magento/community-edition

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by a blind SSRF vulnerability in the bundled dotmailer extension. An attacker with admin privileges could abuse this to achieve remote code execution should Redis be enabled.

Affected Packages

5 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`magento/project-community-edition`	all versions	No fix
🐘Packagist	`magento/community-edition`	all versions	2.3.7-p1`composer require magento/community-edition:^2.3.7-p1`
🐘Packagist	`magento/community-edition`	all versions	No fix
🐘Packagist	`magento/community-edition`	≥ 2.4.2-p1&&< 2.4.2-p2	2.4.2-p2`composer require magento/community-edition:^2.4.2-p2`
🐘Packagist	`magento/community-edition`	all versions	No fix

Affected Products

2 products · 6 configurations

Application

adobe commerceadobe

≥ 2.4.0 && ≤ 2.4.2

1 version

2.4.2

Application

magento open sourceadobe

≥ 2.4.0 && ≤ 2.4.2

1 version

2.4.2

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for magento/project-community-edition, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
A fix is available for CVE-2021-36043; check the affected-versions list above or the advisory for the patched release of magento/project-community-edition, then make sure no transitive dependency still pins the vulnerable range.
Workarounds
Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2021-36043 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.6/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE Classification

CWE-918Server-Side Request Forgery (SSRF)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

magento2

6.2/10

Maintained10/10

Code-Review1/10

Branch-ProtectionN/A

Assessed Oct 26, 2026

Timeline

Disclosed

Sep 1, 2021

Last updated

Oct 24, 2026

Identifiers

CVE-2021-36043

GHSA-36xq-7w8w-xp68

References

Advisorynvd.nist.gov · CVE 2021 36043 Fixhelpx.adobe.com · apsb21 64 Packagegithub.com · magento2

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs affecting magento/project-community-edition are rated as high or higher (top: critical).

CVE-2025-54264CVE-2025-54263CVE-2025-54266CVE-2025-54267CVE-2025-54265CVE-2025-54236CVE-2025-49555CVE-2025-49556

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026

CVE-2021-36043 — project-community-edition

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2021-36043 in your dependencies?