CVE-2020-8166

rubygem-actionpack: ability to forge per-form CSRF tokens given a global CSRF token

Published Jul 2, 2020 CVSS 3.1 · 4.3 Medium EPSS 1.7% KEV · Not listed
Description
A CSRF forgery vulnerability exists in rails < 5.2.5, rails < 6.0.4 that makes it possible for an attacker to, given a global CSRF token such as the one present in the authenticity_token meta tag, forge a per-form CSRF token.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-4766-1 rails security update
EUVD EUVD EUVD-2020-0429 A CSRF forgery vulnerability exists in rails < 5.2.5, rails < 6.0.4 that makes it possible for an attacker to, given a global CSRF token such as the one present in the authenticity_token meta tag, forge a per-form CSRF token.
Github GHSA Github GHSA GHSA-jp5v-5gx4-jmj9 Ability to forge per-form CSRF tokens in Rails
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
hackerone
Published
Updated
Apr 28, 2026, 3:45 PM
Reserved
Jan 28, 2020, 12:00 AM
Status
Modified
Published
Jul 2, 2020, 7:15 PM
Modified
Jun 17, 2026, 3:25 AM
Severity
Low
Public date
May 18, 2020, 12:00 AM