CVE-2020-8163

mediumpriority · attend · 74EPSS 0.825 · 100 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

4 exploits · PoC

Likely / severe?

82.5% (100th) EPSS

CVSS 6.5 · medium

Is it mine?

13 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

The is a code injection vulnerability in versions of Rails prior to 5.0.1 that wouldallow an attacker who controlled the `locals` argument of a `render` call to perform a RCE.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–8.8

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Psecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-94USprimaryCWE-94USCWE-94US

exploits (4)

Public proof-of-concept and weaponised exploit code.

EDB-48716Rails 5.0.1 - Remote Code ExecutionPoC · exploit_db
RedBinaryRabbit/CVE-2020-8163This is a exploit code for CVE-2020-8163PoC · poc_in_github
h4ms1k/CVE-2020-8163Enviroment and exploit to rce testPoC · poc_in_github
lucasamorimca/CVE-2020-8163CVE-2020-8163 - Remote code execution of user-provided local names in RailsPoC · poc_in_github

affected products (13)

Products and version ranges known to be affected.

n/a https://github.com/rails/rails≤ Fixed in 4.2.11.2enisa_euvdEU
Rails Core Team Ruby on Rails≤ 5.0.1fstec_bduRU
АО «Концерн ВНИИНС» ОС ОН «Стрелец»≤ 16.01.2023fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Common Edition≤ 2.12 «Орёл»fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.6 «Смоленск»fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition для «Эльбрус»≤ 8.1 «Ленинград»fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 9fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 8fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
debian debian linux= 9.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
rubyonrails rails< 5.0.1nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
Bitnami rails< 5.0.1osvUSpkg:bitnami/rails
RubyGems actionview< 4.2.11.3osvUSpkg:gem/actionview

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-cr3x-7m39-c6jqRemote code execution via user-provided local names in ActionView2020-07-07ghsa · osvUS
The is a code injection vulnerability in versions of Rails prior to 5.0.1 that would allow an attacker who controlled the `locals` argument of a `render` call to perform a RCE.
BIT-rails-2020-81632024-03-06vendor · osvUS
The is a code injection vulnerability in versions of Rails prior to 5.0.1 that wouldallow an attacker who controlled the `locals` argument of a `render` call to perform a RCE.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv nvd NVD CVE.org MITRE

published 2020-07-02modified 2026-06-17

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Related entries.

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+10438 more

references (22)

External citations — patches, advisories, analysis.

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