CVE-2022-39338

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

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.

Category

3.5
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.11%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory hackerone.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57 third party advisory
https://github.com/nextcloud/user_oidc/pull/496 third party advisory patch
https://hackerone.com/reports/1687410 third party advisory permissions required

Frequently Asked Questions

What is the severity of CVE-2022-39338?
CVE-2022-39338 has been scored as a low severity vulnerability.
How to fix CVE-2022-39338?
To fix CVE-2022-39338, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-39338 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-39338 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-39338?
CVE-2022-39338 affects nextcloud security-advisories.
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