Internal network scanning via unchecked server URL
Published Sep 8, 2026 · Updated Sep 8, 2026
SSRF in the ONLYOFFICE ownCloud integration plugin 9.12 allows remote authenticated users to scan internal hosts via a Document Server URL. The administrator settings endpoint accepts that URL and initiates outbound connections without blocking localhost or private network destinations. Administrator access is required; response differences expose reachable hosts and TCP ports but do not provide direct access to internal data.
Summary
What happened
SSRF in the ONLYOFFICE ownCloud integration plugin 9.12 allows remote authenticated users to scan internal hosts via a Document Server URL. The administrator settings endpoint accepts that URL and initiates outbound connections without blocking localhost or private network destinations. Administrator access is required; response differences expose reachable hosts and TCP ports but do not provide direct access to internal data.
The record
- CVE
- CVE-2026-84282
- Published
- Sep 8, 2026
- Updated
- Sep 8, 2026
- Vendor
- Ascensio System SIA
- Product
- ONLYOFFICE ownCloud integration plugin
- Classifications
- T1046
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=9.12
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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