CVE-2022-39338

Stored cross site scripting (XSS) vulnerability via Authorization Endpoint in user_oidc

State: Published
Severity: 3.5 Low
Published: Nov 25, 2022
Updated: Apr 23, 2025
Reserved: Sep 2, 2022

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	3.5 Low	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-20 Improper Input Validation
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
security-advisoriesnextcloud	< 1.2.1Affected

References

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