CVE-2012-0479: n/a vulnerability

CVE-2012-0479: Mozilla Firefox 4.x through 11.0, Firefox ESR 10.x before 10.0.4, Thunderbird 5.0 through 11.0, Thunderbird...

Mozilla Firefox 4.x through 11.0, Firefox ESR 10.x before 10.0.4, Thunderbird 5.0 through 11.0, Thunderbird ESR 10.x before 10.0.4, and SeaMonkey before 2.9 allow remote attackers to spoof the address bar via an https URL for invalid (1) RSS or (2) Atom XML content.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 18:23 UTC (UTC+00:00)

Security readout for executives and security teams

This vulnerability let a malicious site make certain old Mozilla products show a misleading HTTPS address bar when handling invalid RSS or Atom XML content. The main business risk is phishing and user deception, not direct system takeover. It matters most where legacy Firefox, Thunderbird, or SeaMonkey versions still exist. Exposure is most likely limited to legacy endpoints, old Linux distributions, or unmanaged systems still running the listed Mozilla versions. Modern supported Mozilla releases should not be assumed affected from this bundle. Treat this as a legacy-client cleanup and phishing-risk issue. It is not supported as actively exploited in the provided sources, but it can undermine user trust in HTTPS indicators on affected systems. Mitigation focus: Inventory Firefox, Thunderbird, and SeaMonkey versions across managed endpoints.; Upgrade affected Mozilla products to vendor-supported fixed releases.; Review Mozilla and OS vendor advisories for package-specific update guidance..

Prepared: Jun 24, 2026, 12:52 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: Apr 25, 2012, 10:00 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=714631CVE reference · x_refsource_CONFIRM
oval:org.mitre.oval:def:17011CVE reference · vdb-entry, signature
firefox-rss-spoofing(75156)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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