Is CVE-2013-4660 being actively exploited?

CVE-2013-4660 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-4660?

CVE-2013-4660 has a CVSS 2.0 base score of 6.8 (MEDIUM).

CVE-2013-4660

MEDIUM · CVSS 6.8EPSS 17.3%EU EUVD

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.

Key facts

CVSS score: 6.8 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-20
EPSS score: 17.3% (97th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2017-0338)
Published: June 28, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2017-0338 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2024.

View on the EU Vulnerability Database

Affected products

nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml
nodeca / js-yaml

References

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)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain