4.3

CVE-2020-8166: debian debian_linux Cross-Site Request Forgery

Modified
AliasesSUSE-SU-2024:0103-1UBUNTU-CVE-2020-8166DEBIAN-CVE-2020-8166
Published 02-07-2020Last modified 28-04-2026

Vulnerability summary

CVE-2020-8166 is a medium (CVSS 4.3) Cross-Site Request Forgery vulnerability in debian debian_linux. EPSS estimates a 1.67% chance of exploitation in the next 30 days, higher than 76.8% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.67%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 9 · Related 7
DSA-4766-1OPENSUSE-SU-2020:1993-1OPENSUSE-SU-2020:2000-1OPENSUSE-SU-2024:10589-1OPENSUSE-SU-2024:11821-1RHSA-2021:1313

Timeline

  1. 02-07-2020
    PublishedVulnerability first disclosed.
  2. 28-04-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

1.67%

Chance of exploitation in the next 30 days

Percentile

77%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.67% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (hackerone.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Suse5 products
  • rubygem-actionpack-5_1&distro=SUSE Linux Enterprise High Availability Extension 15 SP1< 5.1.4-150000.3.29.1
  • rubygem-actionpack-5_1&distro=SUSE Linux Enterprise High Availability Extension 15 SP2< 5.1.4-150000.3.29.1
  • rubygem-actionpack-5_1&distro=SUSE Linux Enterprise High Availability Extension 15 SP3< 5.1.4-150000.3.29.1
  • rubygem-actionpack-5_1&distro=SUSE Linux Enterprise High Availability Extension 15 SP4< 5.1.4-150000.3.29.1
  • rubygem-actionpack-5_1&distro=SUSE Linux Enterprise High Availability Extension 15 SP5< 5.1.4-150000.3.29.1
Debian2 products
Opensuse2 products
  • rubygem-actionpack-5_1&distro=openSUSE Leap 15.4< 5.1.4-150000.3.29.1
  • rubygem-actionpack-5_1&distro=openSUSE Leap 15.5< 5.1.4-150000.3.29.1
RubyGems1 product
  • actionpack≥ 5.0.0, < 5.2.4.3 | ≥ 6.0.0, < 6.0.3.1
Rubyonrails1 product
  • rails< 5.2.4.3 | ≥ 6.0.0, < 6.0.3.1
Ubuntu1 product
  • railsAll versions (No fix recorded)

6 vendors · 12 products

References

16 links
Show all 16 references