Account data theft via uploaded script content
Published Nov 27, 2025 · Updated Nov 28, 2025
Cross-site scripting in the OX App Suite backend allows remote attackers to execute script code through uploaded malicious files. The backend makes attacker-uploaded active content reachable through attacker-controlled links without neutralizing embedded script code. Exploitation requires a signed-in user to follow a prepared link; the script runs in that user's account context and can issue unintended actions or exfiltrate sensitive information.
Summary
What happened
Cross-site scripting in the OX App Suite backend allows remote attackers to execute script code through uploaded malicious files. The backend makes attacker-uploaded active content reachable through attacker-controlled links without neutralizing embedded script code. Exploitation requires a signed-in user to follow a prepared link; the script runs in that user's account context and can issue unintended actions or exfiltrate sensitive information.
The record
- CVE
- CVE-2025-30186
- Published
- Nov 27, 2025
- Updated
- Nov 28, 2025
- Vendor
- Open-Xchange GmbH
- Product
- OX App Suite
- Classifications
- CWE-79, T1204.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 27, 2025CVE publishedPublication date reported by the CVE source.
- Nov 28, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=8.35.107
- Affected versionversion=0 <=8.38.89
- Affected versionversion=0 <=8.39.83
- Affected versionversion=0 <=8.40.68
- Affected versionversion=0 <=8.41.60
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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