Vulnerability Details CVE-2023-39959
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.9, 26.0.4, and 27.0.1, unauthenticated users could send a DAV request which reveals whether a calendar or an address book with the given identifier exists for the victim. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 50.2%
CVSS Severity
CVSS v3 Score 3.5
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g97r-8ffm-hfpj
- https://github.com/nextcloud/server/pull/38747
- https://hackerone.com/reports/1832126
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g97r-8ffm-hfpj
- https://github.com/nextcloud/server/pull/38747
- https://hackerone.com/reports/1832126
Products affected by CVE-2023-39959
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cpe:2.3:a:nextcloud:nextcloud_server:25.0.0
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cpe:2.3:a:nextcloud:nextcloud_server:25.0.2
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cpe:2.3:a:nextcloud:nextcloud_server:25.0.3
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cpe:2.3:a:nextcloud:nextcloud_server:25.0.4
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cpe:2.3:a:nextcloud:nextcloud_server:25.0.5
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cpe:2.3:a:nextcloud:nextcloud_server:25.0.6
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cpe:2.3:a:nextcloud:nextcloud_server:25.0.7
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cpe:2.3:a:nextcloud:nextcloud_server:25.0.8
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cpe:2.3:a:nextcloud:nextcloud_server:26.0.0
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cpe:2.3:a:nextcloud:nextcloud_server:26.0.1
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cpe:2.3:a:nextcloud:nextcloud_server:26.0.2
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cpe:2.3:a:nextcloud:nextcloud_server:26.0.3
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cpe:2.3:a:nextcloud:nextcloud_server:27.0.0