CVE-2011-5331

Name: CVE-2011-5331
Creator: NVD / NIST
Published: 2019-11-18T18:15:09.807+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.75%

Last modified Jun 16, 2026

CVE-2011-5331 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.. EPSS estimates a 2.75% chance of exploitation in the next 30 days.

Description

Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.75%

84.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Distributed Ruby Project	Distributed Ruby	1.8

References

https://www.exploit-db.com/exploits/17058Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/17058Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Nov 18, 2019
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-5331?

Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.

How severe is CVE-2011-5331?

CVE-2011-5331 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.75% probability of exploitation in the next 30 days.

How do I fix CVE-2011-5331?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-5331?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST