Vulnerability Details CVE-2025-66512
Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Server Enterprise prior to 31.0.12 and 32.0.3, a missing sanitization allowed malicious users to circumvent the content security policy when a malicious user manages to trick a user it viewing an uploaded SVG outside of the Nextcloud Servers web page.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 9.9%
CVSS Severity
CVSS v3 Score 5.4
References
Products affected by CVE-2025-66512
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cpe:2.3:a:nextcloud:nextcloud_server:31.0.0
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cpe:2.3:a:nextcloud:nextcloud_server:31.0.1
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cpe:2.3:a:nextcloud:nextcloud_server:31.0.2
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cpe:2.3:a:nextcloud:nextcloud_server:31.0.3
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cpe:2.3:a:nextcloud:nextcloud_server:31.0.4
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cpe:2.3:a:nextcloud:nextcloud_server:31.0.5
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cpe:2.3:a:nextcloud:nextcloud_server:31.0.6
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cpe:2.3:a:nextcloud:nextcloud_server:31.0.7
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cpe:2.3:a:nextcloud:nextcloud_server:31.0.8
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cpe:2.3:a:nextcloud:nextcloud_server:32.0.0