CVE-2012-4195: n/a vulnerability

CVE-2012-4195: The nsLocation::CheckURL function in Mozilla Firefox before 16.0.2, Firefox ESR 10.x before 10.0.10, Thunde...

The nsLocation::CheckURL function in Mozilla Firefox before 16.0.2, Firefox ESR 10.x before 10.0.10, Thunderbird before 16.0.2, Thunderbird ESR 10.x before 10.0.10, and SeaMonkey before 2.13.2 does not properly determine the calling document and principal in its return value, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via a crafted web site, and makes it easier for remote attackers to execute arbitrary JavaScript code by leveraging certain add-on behavior.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 20:28 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2012-4195 affects old Mozilla Firefox, Thunderbird, and SeaMonkey releases. A malicious website could make cross-site scripting easier and, in some add-on situations, make arbitrary JavaScript execution easier. This is mainly a legacy-software risk today, not a current mainstream-browser emergency based on the provided sources. Exposure is most likely on unmanaged or legacy systems still running pre-16.0.2 Firefox or Thunderbird, ESR 10.x before 10.0.10, or SeaMonkey before 2.13.2. Modern managed fleets are unlikely to be exposed unless old application packages remain installed. Treat this as a cleanup and legacy-risk item unless old Mozilla clients are still present in production or regulated environments. If exposed versions exist, prioritize remediation because exploitation is remote through web content, but the provided sources do not show active exploitation. Mitigation focus: Upgrade Firefox and Thunderbird to 16.0.2 or later where applicable.; Upgrade ESR 10.x installations to 10.0.10 or later.; Upgrade SeaMonkey to 2.13.2 or later..

Prepared: Jun 24, 2026, 19:46 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Oct 29, 2012, 18:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.mozilla.org/show_bug.cgi?id=793121CVE reference · x_refsource_CONFIRM
oval:org.mitre.oval:def:16856CVE reference · vdb-entry, signature

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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