Description
The simple_captcha2 gem 0.2.3 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party.
References (3)
Core 3
Core References
Third Party Advisory x_refsource_misc
https://github.com/rubygems/rubygems.org/issues/2073
Third Party Advisory x_refsource_misc
https://rubygems.org/gems/simple_captcha2/versions/
Third Party Advisory x_refsource_misc
https://snyk.io/vuln/SNYK-RUBY-SIMPLECAPTCHA2-455501
Scores
CVSS v3
9.8
EPSS
0.0140
EPSS Percentile
80.7%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-94
Status
published
Products (2)
rubygems/simple_captcha2
RubyGems
simple_captcha2_project/simple_captcha2
0.2.3
Published
Jul 26, 2019
Tracked Since
Feb 18, 2026