Is CVE-2013-0256 in the CISA KEV catalog?

No. CVE-2013-0256 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-0256?

CVE-2013-0256 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2013-0256?

CVE-2013-0256 has an EPSS score of 3.62% (88th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2013-0256

MEDIUMEPSS 88th pctl

4.3

CVSS v2

NVD

Description

darkfish.js in RDoc 2.3.0 through 3.12 and 4.x before 4.0.0.preview2.1, as used in Ruby, does not properly generate documents, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted URL.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

rdocNVD

Affected:>= 2.3.0, < 3.12Fixed in:3.12CVE-2013-0256derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

3.62%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Vendor Advisory1

ruby-lang.org

Third-Party Advisory10

Issue Tracking1

bugzilla.redhat.com

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.