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Fencer Intel
medium 6.8

CVE-2013-4562 json

omniauth-facebook Cross-Site Request Forgery vulnerability

published 12y ago modified 4mo ago also GHSA-cf36-985g-v73c , EUVD-2017-0216

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

The omniauth-facebook gem 1.4.1 before 1.5.0 does not properly store the session parameter, which allows remote attackers to conduct cross-site request forgery (CSRF) attacks via the state parameter.

Patch / fix

  • rubygems omniauth-facebook 1.5.0

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Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/mkdynamic/omniauth-facebook/commit/ccfcc26fe7e34acbd75ad4a095fd01ce5ff48ee7 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected packages

ecosystem package affected fixed in
rubygems omniauth-facebook
>=1.4.1, <1.5.0
1.5.0

Classification

Weakness
  • CWE-352 Cross-Site Request Forgery

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.