CVE-2023-28848

CSRF protection on user_oidc login returned the expected token in case of an error

CVSS 4.8 MEDIUMEPSS 0.3%CWE-352

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.8EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

04 Apr 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected products

nextcloud · security-advisories

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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