CVE-2022-39338
low-risk
Published 2022-11-25
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.
Do I need to act?
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0.31% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.5/10
Low
NETWORK
/ LOW complexity
Affected Products (1)
Openid Connect User Backend
Affected Vendors
References (6)
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-7...
Permissions Required
https://hackerone.com/reports/1687410
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-7...
Permissions Required
https://hackerone.com/reports/1687410
22
/ 100
low-risk
Severity
16/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal