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MEDIUM severity

CVE-2021-44649 — django-cms

MEDIUM

CVE-2021-44649 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in django-cms. 1 public exploit reference exists, so weaponization risk is real. A fix is available for django-cms — see the affected versions and patch details below.

Cross-site Scripting in django-cms

Also known asGHSA-hx7c-qpfq-xcrpPYSEC-2022-7
Published
Updated
Affected
4 pkgs
Patched
4 / 4
Exploits
1 known
Exploitation data as of Oct 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs48th percentile — riskier than 48% of all scored CVEsHighest risk
0.12%0.45%0.78%1.12%0.6%0.6%Jul 26Oct 26

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

How urgent is this, really

CVE-2021-44649 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 383,485 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

4 pkgs affected
🐍django-cms🐍django-cms🐍django-cms🐍django-cms

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

Description

Django CMS 3.7.3 does not validate the plugin_type parameter while generating error messages for an invalid plugin type, resulting in a Cross Site Scripting (XSS) vulnerability. The vulnerability allows an attacker to execute arbitrary JavaScript code in the web browser of the affected user.

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIdjango-cms≥ 3.7.0&&< 3.7.43.7.4pip install --upgrade 'django-cms==3.7.4'
🐍PyPIdjango-cms≥ 3.6.0&&< 3.6.13.6.1pip install --upgrade 'django-cms==3.6.1'
🐍PyPIdjango-cms≥ 3.5.0&&< 3.5.43.5.4pip install --upgrade 'django-cms==3.5.4'
🐍PyPIdjango-cms≥ 3.4.0&&< 3.4.73.4.7pip install --upgrade 'django-cms==3.4.7'

Affected Products

1 product · 4 configurations
Application
django cmsdjango-cms
≥ 3.7.0 && < 3.7.4
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Django CMS 3.7.3 does not validate the plugin_type parameter while gener…

sahildhar.github.ioNVDJan 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update django-cms to 3.7.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-44649 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

Django CMS 3.7.3 does not validate the plugin_type parameter while generating error messages for an invalid plugin type, resulting in a Cross Site Scripting (XSS) vulnerability. The vulnerability allows an attacker to execute arbitrary JavaScript code in the web browser of the affected user.
O3 Security · Impact-Aware SCA

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CVE-2021-44649: django-cms — Fixed in 3.7.4 | O3 Security