CVE-2019-14282: Simple CAPTCHA2 Project Simple CAPTCHA2

Critical severity, CVSS 9.8. EPSS: 3.1% chance of exploitation in the next 30 days.

The simple_captcha2 gem 0.2.3 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party.

Affected products

• Simple CAPTCHA2 Project Simple CAPTCHA2: version 0.2.3 only

Published 2019-07-26. Last modified 2026-06-17.