CVE-2023-32074 — user_oidc app is an OpenID Connect user backend for Nextcloud

user_oidc app is an OpenID Connect user backend for Nextcloud. Authentication can be broken/bypassed in user_oidc app. It is recommended that the Nextcloud user_oidc app is upgraded to 1.3.2

01What is this vulnerability?

user_oidc app is an OpenID Connect user backend for Nextcloud. Authentication can be broken/bypassed in user_oidc app. It is recommended that the Nextcloud user_oidc app is upgraded to 1.3.2

02Affected products

Vendor	Product	Versions
nextcloud	security	advisories — < 1.3.2

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-05-25T22:59:27.860Z
• Last modified: 2025-01-16T18:19:01.564Z

09References

• github.com — https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x8mc-8…
• github.com — https://github.com/nextcloud/user_oidc/pull/615
• hackerone.com — https://hackerone.com/reports/1954711