CVE-2013-4660

6.8 MEDIUM 17% exploit odds Fix listed Code execution Library

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 17.2% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2013-06-28 14:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:57 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 17.2% in the next 30 days (EPSS).
Severity: 6.8 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2013-06-28 14:55 UTC
Last modified: 2026-06-16 23:57 UTC
Exploit probability: 17.2% · EPSS, next 30 days
Weakness: CWE-20 · Improper input validation
Record status: Modified

Affected

Nodeca js-yaml ≤ 2.0.4
Nodeca js-yaml 0.2.0
Nodeca js-yaml 0.2.1
Nodeca js-yaml 0.2.2
Nodeca js-yaml 0.3.0
Nodeca js-yaml 0.3.1
Nodeca js-yaml 0.3.2
Nodeca js-yaml 0.3.3

Attack profile CVSS 2.0 · 6.8

Attack vector: Network
Complexity: Medium
Authentication: None
Confidentiality: Partial
Integrity: Partial
Availability: Partial

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2013-4660.md and follow it. Check whether this project is affected by CVE-2013-4660. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record