A vulnerability has been found in Mozilla Firefox up to 139 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component WebCompat Extension. The manipulation leads to information disclosure.
This vulnerability is known as CVE-2025-6425. The attack can be launched remotely. There is no exploit available.
It is recommended to upgrade the affected component.
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CVE-2025-6425 | Mozilla Firefox up to 139 WebCompat Extension information disclosure (Nessus ID 240338)
A vulnerability has been found in Mozilla Firefox up to 139 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component WebCompat Extension. The manipulation leads to information…
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IoC Intelligence (1 Indikatoren)
CVE-2025-6425
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title: Detect Exploitation - CVE-2025-6425 | Mozilla Firefox up to 139 WebCompat Extension information disclosure (Nessus ID 240338)
id: ab64404f-c66f-44fe-b7c6-e2604b556abc
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-24
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessrule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-24"
description = "YARA Signature for "
strings:
$str = "CVE-2025-6425 | Mozilla Firefo" ascii wide
condition:
any of them
}INFRASTRUCTURE BLAST RADIUS & EXPOSURE
Live-Vektor: LOCAL
LOCALIZED
Perimeter & Ingress
Geringes Risiko
Lateral Pivot & AD
GEFÄHRDET (80%)
Crown Jewels & DB
Geringes Risiko
Supply Chain Reach
Geringes Risiko
tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich CVE-2025-6425 | Mozilla Firefox up to 13.... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
🛡️ Angriffsfläche & Exposure
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
⚡ Empfohlene Sofortmaßnahmen
- 1. Perimeter-Inspektion: Relevante Portfreigaben und exponierte Endpunkte unverzüglich scannen.
- 2. Patch-Applikation: Hersteller-Hotfix einspielen oder betroffene Daemons in isolierte DMZ-Segmente überführen.
- 3. Telemetrie & EDR-Alerts: Prozessaufrufe und Child-Processes auf anomale Shell-Spawns überwachen.
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