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CVE-2023-39954

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Date: August 10, 2023

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.

Language: PHP

Severity Score

Related Resources (5)

https://nvd.nist.gov/vuln/detail/CVE-2023-39954
https://github.com/nextcloud/user_oidc/pull/636
https://hackerone.com/reports/1994328
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gq
https://www.mend.io/vulnerability-database/CVE-2023-39954

Severity Score

Weakness Type (CWE)

Missing Encryption of Sensitive Data

CWE-311

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): NONE

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