How severe is CVE-2011-5331?

CVE-2011-5331 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2011-5331 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-5331?

CVE-2011-5331 affects Distributed Ruby Project Distributed Ruby. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-5331?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-5331 published?

CVE-2011-5331 was published on 2019-11-18 and last updated on 2026-06-16.

CVE-2011-5331

CVE-2011-5331 is a critical-severity vulnerability in Distributed Ruby Project Distributed Ruby with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Distributed Ruby Project Distributed Ruby
Published: 2019-11-18
Last modified: 2026-06-16

Description

Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.

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 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2011-5331 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-5331?: CVE-2011-5331 affects Distributed Ruby Project Distributed Ruby. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-5331?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-5331 published?: CVE-2011-5331 was published on 2019-11-18 and last updated on 2026-06-16.

References

https://www.exploit-db.com/exploits/17058

Affected products (1)

cpe:2.3:a:distributed_ruby_project:distributed_ruby:1.8:*:*:*:*:*:*:*

More vulnerabilities in Distributed Ruby Project Distributed Ruby

CVE-2011-5330 — Critical (CVSS 9.8): Distributed Ruby (aka DRuby) 1.8 mishandles the sending of syscalls.

All CVEs affecting Distributed Ruby Project Distributed Ruby →