CVE-2013-4593 is a high-severity (CVSS 7.5) Improper Authentication vulnerability in omniauth-facebook. A fix is available for omniauth-facebook — see the affected versions and patch details below.
omniauth-facebook Improper Authentication vulnerability
EPSS Exploitation Probability
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
omniauth-facebookReal-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
RubyGem omniauth-facebook has an access token security vulnerability.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | omniauth-facebook | all versions | 1.5.1bundle update omniauth-facebook --conservative |
Affected Products
omniauth-facebookomniauth-facebook_projectDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for omniauth-facebook, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update omniauth-facebook to 1.5.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-4593 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.
Frequently Asked Questions
Is CVE-2013-4593 in your dependencies?
Find it across RubyGems, including transitive dependencies.