CVE-2016-6186 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in django. 1 public exploit reference exists, so weaponization risk is real. A fix is available for django — see the affected versions and patch details below.
Django Cross-site scripting Vulnerability
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2016-6186 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,166 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
django🐍django🐍djangoReal-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
Cross-site scripting (XSS) vulnerability in the dismissChangeRelatedObjectPopup function in contrib/admin/static/admin/js/admin/RelatedObjectLookups.js in Django before 1.8.14, 1.9.x before 1.9.8, and 1.10.x before 1.10rc1 allows remote attackers to inject arbitrary web script or HTML via vectors involving unsafe usage of Element.innerHTML.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | django | all versions | 1.8.14pip install --upgrade 'django==1.8.14' |
| 🐍PyPI | django | ≥ 1.9&&< 1.9.8 | 1.9.8pip install --upgrade 'django==1.9.8' |
| 🐍PyPI | django | ≥ 1.10a1&&< 1.10rc1 | 1.10rc1pip install --upgrade 'django==1.10rc1' |
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 3.3.0 - Editor Snippet Persistent Cross-Site Scripting
by Vulnerability-Lab · Jul 20, 2016
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for django, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update django to 1.8.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-6186 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2016-6186 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2016-6186. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | python-django-0:1.8.14-1.el7ost | RHSA-2016:1595 |
| Red Hat OpenStack Platform 8.0 (Liberty) | python-django-0:1.8.14-1.el7ost | RHSA-2016:1596 |
| Red Hat OpenStack Platform 8.0 Operational Tools for RHEL 7 | python-django-0:1.8.14-1.el7ost | RHSA-2016:1594 |
Frequently Asked Questions
Is CVE-2016-6186 in your dependencies?
O3 Security finds CVE-2016-6186 across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.