Is CVE-2013-0757 in the CISA KEV catalog?

No. CVE-2013-0757 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-0757?

CVE-2013-0757 has a CVSS v2 base score of 9.3 (HIGH).

What is the EPSS score for CVE-2013-0757?

CVE-2013-0757 has an EPSS score of 60.86% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2013-0757

HIGHEPSS 99th pctl

9.3

CVSS v2

NVD

Description

The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 17.x before 17.0.2, and SeaMonkey before 2.15 does not prevent modifications to the prototype of an object, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges by referencing Object.prototype.__proto__ in a crafted HTML document.

CWE-20Improper Input Validation

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

60.86%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.