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💎 RubyGems

GHSA-c3gv-9cxf-6f57

MEDIUM

GHSA-c3gv-9cxf-6f57 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in loofah. O3 Security confirms whether GHSA-c3gv-9cxf-6f57 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Loofah Allows Cross-site Scripting

Also known asCVE-2019-15587
Published
Nov 5, 2019
Updated
Feb 16, 2024
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected
💎loofah

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

In the Loofah gem for Ruby through v2.3.0, unsanitized JavaScript may occur in sanitized output when a crafted SVG element is republished.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
💎RubyGemsloofahall versions2.3.1

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for loofah. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update loofah to 2.3.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c3gv-9cxf-6f57 is resolved across your whole dependency graph.

  3. 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.

  4. How O3 protects you

    O3 pinpoints whether GHSA-c3gv-9cxf-6f57 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-c3gv-9cxf-6f57. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

In the Loofah gem for Ruby through v2.3.0, unsanitized JavaScript may occur in sanitized output when a crafted SVG element is republished.
O3 Security · Impact-Aware SCA

Is GHSA-c3gv-9cxf-6f57 in your dependencies?

O3 detects GHSA-c3gv-9cxf-6f57 across RubyGems dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.