Is CVE-2013-0757 being actively exploited?

CVE-2013-0757 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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

CVE-2013-0757 has a CVSS 2.0 base score of 9.3 (HIGH).

CVE-2013-0757

HIGH · CVSS 9.3EPSS 60.9%EU EUVD

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.

Key facts

CVSS score: 9.3 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-20
EPSS score: 60.9% (99th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-0768)
Published: January 13, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-0768 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
mozilla / firefox
mozilla / seamonkey
mozilla / thunderbird
mozilla / thunderbird esr
opensuse / opensuse
opensuse / opensuse
opensuse / opensuse
suse / linux enterprise desktop
suse / linux enterprise desktop
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise software development kit
suse / linux enterprise software development kit

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

SUSE Linux Enterprise Server 11 Service Pack 2 on IBM System z - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0852-2013 - archived
SUSE Linux Enterprise Server 11 Service Pack 2 including KVM virtualization - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0787-2013 - archived

References

http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00006.html(Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00007.html(Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00010.html(Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00017.html(Third Party Advisory)
http://www.mozilla.org/security/announce/2013/mfsa2013-14.html(Vendor Advisory)
http://www.ubuntu.com/usn/USN-1681-1(Third Party Advisory)
http://www.ubuntu.com/usn/USN-1681-2(Third Party Advisory)
http://www.ubuntu.com/usn/USN-1681-4(Third Party Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=813901(Exploit, Issue Tracking, Patch, Vendor Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16939(Third Party Advisory)

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

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