NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
💎
💎 RubyGems
Not in CISA KEV
MEDIUM severity

CVE-2020-36190 — rails_admin

MEDIUMFix: sferik/rails_admin@d72090e

CVE-2020-36190 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in rails_admin. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for rails_admin — see the affected versions and patch details below.

rails_admin ruby gem XSS vulnerability

Also known asGHSA-wjx2-7hqq-8h7m
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
1 known
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs70th percentile — riskier than 70% of all scored CVEsHighest risk
0.00%0.60%1.20%1.79%0.3%1.3%May 26Sep 26Nov 26

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

2 pkgs affected
💎rails_admin💎rails_admin

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

Description

RailsAdmin (aka rails_admin) before 1.4.3 and 2.x before 2.0.2 allows XSS via nested forms.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
💎RubyGemsrails_adminall versions1.4.3bundle update rails_admin --conservative
💎RubyGemsrails_admin≥ 2.0.0&&< 2.0.22.0.2bundle update rails_admin --conservative

Affected Products

1 product · 2 configurations
Application
rails adminrails_admin_project
≥ 2.0.0 && < 2.0.2
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.

RailsAdmin (aka rails_admin) before 1.4.3 and 2.x before 2.0.2 allows XS…

github.comNVDJan 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update rails_admin to 1.4.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-36190 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

RailsAdmin (aka rails_admin) before 1.4.3 and 2.x before 2.0.2 allows XSS via nested forms.
O3 Security · Impact-Aware SCA

Is CVE-2020-36190 in your dependencies?

Find it across RubyGems, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2020-36190: rails_admin XSS — Fixed in 1.4.3