CVE-2023-39954
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.44% probability · 38th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-311
- Affected
- nextcloud/user oidc
- Source
- security-advisories@github.com
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gqPatch, Vendor Advisory
- https://github.com/nextcloud/user_oidc/pull/636Patch
- https://hackerone.com/reports/1994328Permissions Required
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gqPatch, Vendor Advisory
- https://github.com/nextcloud/user_oidc/pull/636Patch
- https://hackerone.com/reports/1994328Permissions Required
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.