How severe is CVE-2013-4660?

CVE-2013-4660 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2013-4660 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4660?

CVE-2013-4660 primarily affects Nodeca Js-yaml. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4660?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-4660 published?

CVE-2013-4660 was published on 2013-06-28 and last updated on 2026-06-16.

CVE-2013-4660

CVE-2013-4660 is a medium-severity vulnerability in Nodeca Js-yaml with a CVSS 2.0 base score of 6.8. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Nodeca Js-yaml
Published: 2013-06-28
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2013-4660?: 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.
How severe is CVE-2013-4660?: CVE-2013-4660 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2013-4660 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4660?: CVE-2013-4660 primarily affects Nodeca Js-yaml. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4660?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4660 published?: CVE-2013-4660 was published on 2013-06-28 and last updated on 2026-06-16.

References

Affected products (20)

cpe:2.3:a:nodeca:js-yaml:*:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.2.0:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.2.1:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.2.2:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.3.0:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.3.1:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.3.2:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.3.3:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.3.4:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.3.5:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.3.6:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:0.3.7:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:nodeca:js-yaml:2.0.3:*:*:*:*:*:*:*

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