CVE-2022-39338 LOW

CVE-2022-39338: Stored cross site scripting (XSS) vulnerability via Authorization Endpoint in user_oidc

Vendor Nextcloud
Product security-advisories
Weakness CWE-20 · Input validation
Published November 25, 2022
Last update April 23, 2025
View on NVD All CVEs

CVSS base score

3.5/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N

What the vulnerability does

01Description

user_oidc is an OpenID Connect user backend for Nextcloud. Versions prior to 1.2.1 did not properly validate discovery urls which may lead to a stored cross site scripting attack vector. The impact is limited due to the restrictive CSP that is applied on this endpoint. Additionally this vulnerability has only been shown to be exploitable in the Safari web browser. This issue has been addressed in version 1.2.1. Users are advised to upgrade. Users unable to upgrade should urge their users to avoid using the Safari web browser.

Key dates

02Disclosure timeline

November 25, 2022 CVE published
April 23, 2025 Record updated