Server-side request forgery via lax local domain checks
Published Sep 16, 2022 · Updated Apr 23, 2025
Server-Side Request Forgery in Nextcloud Server before 23.0.8 and 24.0.4 allows remote authenticated users to reach local webservices via crafted requests. Local domain and IP filtering accepts attacker-controlled destinations too broadly, so the server issues requests to services that should be blocked. Exploitation requires low-privilege authentication and user interaction; the documented consequence is limited confidentiality loss from responses returned by reachable local services.
Summary
What happened
Server-Side Request Forgery in Nextcloud Server before 23.0.8 and 24.0.4 allows remote authenticated users to reach local webservices via crafted requests. Local domain and IP filtering accepts attacker-controlled destinations too broadly, so the server issues requests to services that should be blocked. Exploitation requires low-privilege authentication and user interaction; the documented consequence is limited confidentiality loss from responses returned by reachable local services.
The record
- CVE
- CVE-2022-39211
- Published
- Sep 16, 2022
- Updated
- Apr 23, 2025
- Vendor
- Nextcloud GmbH
- Product
- Security Advisories
- Classifications
- CWE-918, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 16, 2022CVE publishedPublication date reported by the CVE source.
- Apr 23, 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=< 23.0.8
- Affected versionversion=>= 24.0.0, < 24.0.4
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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