PT-2013-5118 · Js Yaml · Js-Yaml

Neal Poole · Published 2013-06-28 · Updated 2025-12-02 · CVE-2013-4660

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions js-yaml versions 2.0.4 and earlier

Description The issue allows remote attackers to execute arbitrary code via a crafted string that triggers an eval operation, due to the JS-YAML module parsing input without properly considering the unsafe !!js/function tag.

Recommendations Update to version 2.0.5 or later, and ensure that all instances where the load() method is called are updated to use safeLoad() instead.

Exploit

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2013-4660

GHSA-XXVW-45RP-3MJ2

Affected Products

Js-Yaml

References · 9

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/fileformat/nodejs_js_yaml_load_code_exec.rb · Exploit
• 🔥 https://nealpoole.com/blog/2013/06/code-execution-via-yaml-in-js-yaml-nodejs-module · Exploit
• 🔥 https://exploit-db.com/exploits/28655 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2013-4660 · Security Note
• https://osv.dev/vulnerability/GHSA-xxvw-45rp-3mj2 · Vendor Advisory
• http://portal.nodesecurity.io/advisories/js-yaml · Vendor Advisory
• https://github.com/advisories/GHSA-xxvw-45rp-3mj2 · Note
• https://t.me/cveNotify/144516 · Telegram Post
• https://npmjs.com/advisories/16 · Note