CVE-2023-28848

Summary

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.

Affected Software

Weaknesses

• CWE-352: CWE-352: Cross-Site Request Forgery (CSRF)

ADP Enrichment

CVE Program Container

Additional 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

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

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

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