CVE-2020-8166

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

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se presenta una vulnerabilidad de falsificación CSRF en rails versiones anteriores a 5.2.5, rails versiones anteriores a 6.0.4 que hace posible para un atacante, dado un token CSRF global como el presente en la etiqueta meta de authenticity_token, forjar un token CSRF per-form

A flaw was found in rubygem-actionpack. Forgery of a per-form CSRF token is possible allowing for any action to take place for that session. The highest threat from this vulnerability is to data integrity.

Multiple security issues were discovered in the Rails web framework which could result in cross-site scripting, information leaks, code execution, cross-site request forgery or bypass of upload limits.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-01-28 CVE Reserved
2020-07-02 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-352: Cross-Site Request Forgery (CSRF)

CAPEC

References (5)

URL	Tag	Source

URL	Date	SRC
https://hackerone.com/reports/732415	2024-08-04

URL	Date	SRC
https://groups.google.com/g/rubyonrails-security/c/NOjKiGeXUgw	2020-11-20

URL	Date	SRC
https://www.debian.org/security/2020/dsa-4766	2020-11-20
https://access.redhat.com/security/cve/CVE-2020-8166	2021-04-21
https://bugzilla.redhat.com/show_bug.cgi?id=1843152	2021-04-21

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Rubyonrails Search vendor "Rubyonrails"		Rails Search vendor "Rubyonrails" for product "Rails"				< 5.2.4.3 Search vendor "Rubyonrails" for product "Rails" and version " < 5.2.4.3"		-		Affected
Rubyonrails Search vendor "Rubyonrails"		Rails Search vendor "Rubyonrails" for product "Rails"				>= 6.0.0 < 6.0.3.1 Search vendor "Rubyonrails" for product "Rails" and version " >= 6.0.0 < 6.0.3.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected