CVE-2013-4660

Exp

The JS-YAML module before 2.0.5 for Node.js parses input without properly considering the unsafe !!js/function tag, which allows remote attackers to execute arbitrary code via a crafted string that triggers an eval operation.

Published: 2013-06-28 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]

NVD Status：Modified，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2013-4660

EPSS CVSS CWE GHSA Exploit-DB Affected

Conclusion & alert: CVE-2013-4660 is rated High Exploit Risk (75.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 64.51%, 98th percentile). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2013-4660

EDB-ID	Source	Kind	Published	Link
28655	exploit_db	edb	2013-09-30	Exploit-DB ↗
—	nvd_ref	exploit_tag		Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-4660

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-08-18	65.61%	64.51%	-1.10%
2	2025-03-30	65.66%	65.61%	-0.05%
3	2025-03-29	—	65.66%	—

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-4660

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.8	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:P/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	8.6	6.4	[email protected]

Weakness enumeration for CVE-2013-4660

CWE-20 MITRE ↗

GitHub Security Advisory for CVE-2013-4660

GHSA-xxvw-45rp-3mj2 · Severity: critical · Ecosystem: npm — Deserialization Code Execution in js-yaml

Affected software / configurations for CVE-2013-4660

Vendor	Product	Version	Raw CPE
nodeca	js-yaml	<= 2.0.4	cpe:2.3:a:nodeca:js-yaml::::::::
nodeca	js-yaml	0.2.0	cpe:2.3:a:nodeca:js-yaml:0.2.0:::::::*
nodeca	js-yaml	0.2.1	cpe:2.3:a:nodeca:js-yaml:0.2.1:::::::*
nodeca	js-yaml	0.2.2	cpe:2.3:a:nodeca:js-yaml:0.2.2:::::::*
nodeca	js-yaml	0.3.0	cpe:2.3:a:nodeca:js-yaml:0.3.0:::::::*
nodeca	js-yaml	0.3.1	cpe:2.3:a:nodeca:js-yaml:0.3.1:::::::*
nodeca	js-yaml	0.3.2	cpe:2.3:a:nodeca:js-yaml:0.3.2:::::::*
nodeca	js-yaml	0.3.3	cpe:2.3:a:nodeca:js-yaml:0.3.3:::::::*
nodeca	js-yaml	0.3.4	cpe:2.3:a:nodeca:js-yaml:0.3.4:::::::*
nodeca	js-yaml	0.3.5	cpe:2.3:a:nodeca:js-yaml:0.3.5:::::::*
nodeca	js-yaml	0.3.6	cpe:2.3:a:nodeca:js-yaml:0.3.6:::::::*
nodeca	js-yaml	0.3.7	cpe:2.3:a:nodeca:js-yaml:0.3.7:::::::*
nodeca	js-yaml	1.0.0	cpe:2.3:a:nodeca:js-yaml:1.0.0:::::::*
nodeca	js-yaml	1.0.1	cpe:2.3:a:nodeca:js-yaml:1.0.1:::::::*
nodeca	js-yaml	1.0.2	cpe:2.3:a:nodeca:js-yaml:1.0.2:::::::*
nodeca	js-yaml	1.0.3	cpe:2.3:a:nodeca:js-yaml:1.0.3:::::::*
nodeca	js-yaml	2.0.0	cpe:2.3:a:nodeca:js-yaml:2.0.0:::::::*
nodeca	js-yaml	2.0.1	cpe:2.3:a:nodeca:js-yaml:2.0.1:::::::*
nodeca	js-yaml	2.0.2	cpe:2.3:a:nodeca:js-yaml:2.0.2:::::::*
nodeca	js-yaml	2.0.3	cpe:2.3:a:nodeca:js-yaml:2.0.3:::::::*

References for CVE-2013-4660

URL	Tags
http://portal.nodesecurity.io/advisories/js-yaml	Vendor Advisory
https://nealpoole.com/blog/2013/06/code-execution-via-yaml-in-js-yaml-nodejs-module/	Exploit Vendor Advisory

cvelogic Threat Intelligence