CVE-2022-39339

MEDIUM 4.3CVE-2022-39339 · Published 25/11/2022 · updated 17/06/2026

In short

CVE-2022-39339 is a MEDIUM (CVSS 4.3) vulnerability affecting openid connect user backend (nextcloud).
Chance of exploitation in the next 30 days (EPSS): 0.47%, higher than 40.8% of all vulnerabilities.
Fix: update to 1.2.1 or later.

Package	Affected versions	Patched versions
openid connect user backend nextcloud	`< 1.2.1`	`1.2.1`

Description

user_oidc is an OpenID Connect user backend for Nextcloud. In versions prior to 1.2.1 sensitive information such as the OIDC client credentials and tokens are sent in plain text of HTTP without TLS. Any malicious actor with access to monitor user traffic may have been able to compromise account security. This issue has been addressed in in user_oidc v1.2.1. Users are advised to upgrade. Users unable to upgrade may use https to access Nextcloud. Set an HTTPS discovery URL in the provider settings (in Nextcloud OIDC admin settings).

References

nextcloud/security-advisories security advisory · Patch
nextcloud/user_oidc#495 · Patch
hackerone.com/reports/1687005 · Permissions Required

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