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Open-Xchange OX AppSuite up to 7.8.3-rev11/7.8.4-rev8 Office-Web cross site scripting
A vulnerability classified as critical was found in Open-Xchange OX AppSuite up to 7.8.3-rev11/7.8.4-rev8 (Groupware Software). Affected by this vulnerability is some unknown functionality of the component Office-Web. Applying the patch…
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A vulnerability classified as critical was found in Open-Xchange OX AppSuite up to 7.8.3-rev11/7.8.4-rev8 (Groupware Software). Affected by this vulnerability is some unknown functionality of the component Office-Web. Applying the patch 7.8.3-rev12/7.8.4-rev9 is able to eliminate this problem. A possible mitigation has been published before and not just after the disclosure of the vulnerability.
1. Sofort-Triage & Abwehrmaßnahmen
IR-PLAYBOOK-VULN-REMEDIATIONMEDIUM
Schritte anzeigen
SOC Incident Playbook: Vulnerability Remediation & Verification
1-Click Detection Engineering: Multi-Dialect SIEM Rules5 Formate
Regeln anzeigen
Syntax validiert (0 Fehler)
title: Detect Exploitation - Open-Xchange OX AppSuite up to 7.8.3-rev11/7.8.4-rev8 Office-Web cross site scripting
id: 420d92c7-8d8e-40b5-b84d-f18902056287
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-25
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessSyntax validiert (0 Fehler)
rule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-25"
description = "YARA Signature for "
strings:
$str = "Open-Xchange OX AppSuite up to" ascii wide
condition:
any of them
}Syntax validiert (0 Fehler)
index=security sourcetype IN ("cisco:asa", "pan:traffic", "zeek_conn", "suricata", "WinEventLog:Security")
("Open-Xchange OX AppSuite up to 783-rev11")
| stats count earliest(_time) as first_seen latest(_time) as last_seen by src_ip, dest_ip, dest_host, signature
| eval first_seen=strftime(first_seen, "%Y-%m-%d %H:%M:%S"), last_seen=strftime(last_seen, "%Y-%m-%d %H:%M:%S")
| sort - countSyntax validiert (0 Fehler)
message: "*Open-Xchange OX AppSuite up to 783-rev11*"Syntax validiert (0 Fehler)
CommonSecurityLog
| where Message has "Open-Xchange OX AppSuite up to 783-rev11"
| summarize EventCount = count(), FirstSeen = min(TimeGenerated), LastSeen = max(TimeGenerated) by SourceIP, DestinationIP, DestinationPort, Activity
| extend DetectionRule = "iShareStuff-CTI-Compiled"
| sort by EventCount desc2. Cyber Threat Intelligence & Forensik
🎯
MITRE ATT&CK Matrix Navigator 14 Taktiken
Reconnaissance
-
Resource Development
-
Initial Access
Execution
Persistence
-
Privilege Escalation
Defense Evasion
Credential Access
-
Discovery
-
Lateral Movement
-
Collection
-
Command and Control
Exfiltration
-
Impact
tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich Open-Xchange OX AppSuite up to 7.8.3-rev.... 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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