Vulnerability Details CVE-2023-28848
user_oidc is the OIDC connect user backend for Nextcloud, an open source collaboration platform. A vulnerability in versions 1.0.0 until 1.3.0 effectively allowed an attacker to bypass the state protection as they could just copy the expected state token from the first request to their second request. Users should upgrade user_oidc to 1.3.0 to receive a patch for the issue. No known workarounds are available.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 61.4%
CVSS Severity
CVSS v3 Score 4.8
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-52hv-xw32-wf7f
- https://github.com/nextcloud/user_oidc/pull/580
- https://hackerone.com/reports/1878381
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-52hv-xw32-wf7f
- https://github.com/nextcloud/user_oidc/pull/580
- https://hackerone.com/reports/1878381
Products affected by CVE-2023-28848
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cpe:2.3:a:nextcloud:user_oidc:1.0.0
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cpe:2.3:a:nextcloud:user_oidc:1.1.0
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cpe:2.3:a:nextcloud:user_oidc:1.2.0
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cpe:2.3:a:nextcloud:user_oidc:1.2.1