What is CVE-2019-13589?

CVE-2019-13589 is a critical-severity vulnerability in Anjlab Paranoid2, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 9.8/10. Published 2019-07-14.

How severe is CVE-2019-13589?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Anjlab Paranoid2

CVE-2019-13589

The paranoid2 gem 1.1.6 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party. The current version, without this backdoor, is 1.1.5.

Published 2019-07-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.043 (90.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.043 · newest: 0.043 · change: 0.000

Affected products

Anjlab Paranoid2 — versions 1.1.6

Weakness classification (CWE)

CWE-829 — Inclusion of Functionality from Untrusted Control Sphere

References

github.com/rubygems/rubygems.org/issues/2051 (Exploit, Third Party Advisory, Issue Tracking)
rubygems.org/gems/paranoid2/versions (Vendor Advisory)
www.securityfocus.com/bid/109281 (VDB Entry, Third Party Advisory, vdb-entry)
snyk.io/vuln/SNYK-RUBY-PARANOID2-451600 (Third Party Advisory)

Frequently asked questions

What is CVE-2019-13589?: CVE-2019-13589 is a critical-severity vulnerability in Anjlab Paranoid2, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 9.8/10. Published 2019-07-14.
How severe is CVE-2019-13589?: Critical severity. CVSS v3 base score is 9.8 out of 10.