CVE-2012-5841: n/a vulnerability

CVE-2012-5841: Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x...

Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 implement cross-origin wrappers with a filtering behavior that does not properly restrict write actions, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted web site.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 21:21 UTC (UTC+00:00)

Security readout for executives and security teams

This is a legacy Mozilla browser and mail-client flaw where a malicious website could bypass cross-origin write restrictions and trigger cross-site scripting. The named affected versions are Firefox, Firefox ESR, Thunderbird, Thunderbird ESR, and SeaMonkey releases before the fixed versions listed in the CVE description. Exposure is most likely on unmanaged or legacy endpoints still running the affected Mozilla versions from 2012. Modern supported versions should not be assumed affected from these sources. Treat this as a legacy software hygiene issue unless affected versions are still present. If found, prioritize removal or upgrade because browser-origin flaws can expose users through normal web activity. Mitigation focus: Upgrade Firefox and Thunderbird to 17.0 or later, or ESR 10.0.11 or later.; Upgrade SeaMonkey to 2.14 or later where it is still used.; Apply relevant Linux distribution advisories for packaged Mozilla builds..

Prepared: Jun 24, 2026, 12:04 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

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 21, 2012, 11:00 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

4Source 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=805807CVE reference · x_refsource_CONFIRM
oval:org.mitre.oval:def:16590CVE reference · vdb-entry, signature
mozilla-wrappers-security-bypass(80178)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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