CVE-2013-5601

CVE-2013-5601 is a critical-severity vulnerability in Mozilla Seamonkey with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

• Severity: Critical (CVSS 2.0 base score 10.0)
• EPSS exploit prediction: 5% (92nd percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Mozilla Seamonkey
• Published: 2013-10-30
• Last modified: 2026-06-16

Description

Use-after-free vulnerability in the nsEventListenerManager::SetEventHandler function in Mozilla Firefox before 25.0, Firefox ESR 17.x before 17.0.10 and 24.x before 24.1, Thunderbird before 24.1, Thunderbird ESR 17.x before 17.0.10, and SeaMonkey before 2.22 allows remote attackers to execute arbitrary code via vectors related to a memory allocation through the garbage collection (GC) API.

Frequently asked questions

What is CVE-2013-5601?

Use-after-free vulnerability in the nsEventListenerManager::SetEventHandler function in Mozilla Firefox before 25.0, Firefox ESR 17.x before 17.0.10 and 24.x before 24.1, Thunderbird before 24.1, Thunderbird ESR 17.x before 17.0.10, and SeaMonkey before 2.22 allows remote attackers to execute arbitrary code via vectors related to a memory allocation through the garbage collection (GC) API.

How severe is CVE-2013-5601?

CVE-2013-5601 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2013-5601 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-5601?

CVE-2013-5601 primarily affects Mozilla Seamonkey. In total, 148 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-5601?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2013-5601 published?

CVE-2013-5601 was published on 2013-10-30 and last updated on 2026-06-16.

References

• http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00014.html
• http://rhn.redhat.com/errata/RHSA-2013-1476.html
• http://rhn.redhat.com/errata/RHSA-2013-1480.html
• http://www.debian.org/security/2013/dsa-2788
• http://www.debian.org/security/2013/dsa-2797
• http://www.mozilla.org/security/announce/2013/mfsa2013-100.html
• https://bugzilla.mozilla.org/show_bug.cgi?id=916685
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18495
• https://security.gentoo.org/glsa/201504-01

Affected products (148)

• cpe:2.3:a:mozilla:seamonkey:*:beta2:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0:alpha_1:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0:alpha_2:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0:alpha_3:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0:beta_1:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0:beta_2:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.9:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.11:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.12:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.13:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.0.14:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.1:alpha1:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.1:alpha2:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.1:alpha3:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.1:beta1:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.1:beta2:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.1:beta3:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.1:rc1:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.1:rc2:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.10:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.10:beta1:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.10:beta2:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.10:beta3:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.10.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.11:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.11:beta1:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:2.11:beta2:*:*:*:*:*:*

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• CVE-2013-5610 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 26.0 and SeaMonkey before 2.23…
• CVE-2013-5603 — Critical (CVSS 10.0): Use-after-free vulnerability in the nsContentUtils::ContentIsHostIncludingDescendantOf function in Mozilla Firefox…

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