CVE-2025-6431

When a link can be opened in an external application, Firefox for Android will, by default, prompt the user before doing so. An attacker could have bypassed this prompt, potentially exposing the user to security vulnerabilities or privacy leaks in external applications. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 140.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1942716	Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-51/	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*

cpe:2.3:o:google:android:-:*:*:*:*:*:*:*

History

03 Jul 2025, 16:04

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-06-24 13:15

Updated : 2025-07-03 16:04

NVD link : CVE-2025-6431

Mitre link : CVE-2025-6431

CVE.ORG link : CVE-2025-6431

JSON object : View

Products Affected

google

android

mozilla

firefox

CWE

CWE-285

Improper Authorization

{"id": "CVE-2025-6431", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "published": "2025-06-24T13:15:24.103", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1942716", "tags": ["Permissions Required"], "source": "security@mozilla.org"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-51/", "tags": ["Vendor Advisory"], "source": "security@mozilla.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-285"}]}], "descriptions": [{"lang": "en", "value": "When a link can be opened in an external application, Firefox for Android will, by default, prompt the user before doing so. An attacker could have bypassed this prompt, potentially exposing the user to security vulnerabilities or privacy leaks in external applications. \n*This bug only affects Firefox for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 140."}, {"lang": "es", "value": "Cuando se puede abrir un enlace en una aplicaci\u00f3n externa, Firefox para Android, por defecto, pregunta al usuario antes de hacerlo. Un atacante podr\u00eda haber omitido esta pregunta, exponiendo al usuario a vulnerabilidades de seguridad o filtraciones de privacidad en aplicaciones externas. *Este error solo afecta a Firefox para Android. Las dem\u00e1s versiones de Firefox no se ven afectadas.* Esta vulnerabilidad afecta a Firefox anteriores a la versi\u00f3n 140."}], "lastModified": "2025-07-03T16:04:21.163", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "77D2BF2A-26A3-4664-93B5-B41BCF17AC9E", "versionEndExcluding": "140.0"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:google:android:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "F8B9FEC8-73B6-43B8-B24E-1F7C20D91D26"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security@mozilla.org"}