CVSS 3.1
8.1 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NCVE-2023-39954
High (8.1) in nextcloud user oidc. EPSS 0.4% chance of exploitation in the next 30 days.
user_oidc provides the OIDC connect user backend for Nextcloud, an open-source cloud platform. Starting in version 1.0.0 and prior to version 1.3.3, an attacker that obtained at least read access to a snapshot of the database can impersonate the Nextcloud server towards linked servers. user_oidc 1.3.3 contains a patch. No known workarounds are available.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 38% of CVEs (scores of 2026-10-31)
- CWE
- CWE-311
- Published
- Modified
- Record from
- the NVD, synced
Affected
- nextcloud:user_oidc
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gq
- https://github.com/nextcloud/user_oidc/pull/636
- https://hackerone.com/reports/1994328
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gq
- https://github.com/nextcloud/user_oidc/pull/636