CVEvulnerability

CVE-2023-39953

4.8 MEDIUM Published 2023-08-10 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-08-10
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.8 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS 3.1 ([email protected])
4.8 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-303

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, missing verification of the issuer would have allowed an attacker to perform a man-in-the-middle attack returning corrupted or known token they also have access to. user_oidc 1.3.3 contains a patch. No known workarounds are available.

Affected configurations

• nextcloud user oidc (>= 1.0.0 < 1.3.3)

Related

Weakness · CWE (1)

  • CWE-303 Incorrect Implementation of Authentication Algorithm weakness

References