What is CVE-2022-39339?

CVE-2022-39339 is a medium-severity vulnerability in Nextcloud Openid Connect User Backend, classified under Cleartext Transmission of Sensitive Information. CVSS score: 4.3/10. Published 2022-11-25.

How severe is CVE-2022-39339?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Nextcloud Openid Connect User Backend

CVE-2022-39339

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).

EPSS: 0.004 (34.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

Affected products

Nextcloud Openid_connect_user_backend
Nextcloud Security-advisories — versions < 1.2.1

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

security-advisories@github.com (Patch, Third Party Advisory)
security-advisories@github.com (Patch, Third Party Advisory)
security-advisories@github.com (Permissions Required, Third Party Advisory)

Frequently asked questions

What is CVE-2022-39339?: CVE-2022-39339 is a medium-severity vulnerability in Nextcloud Openid Connect User Backend, classified under Cleartext Transmission of Sensitive Information. CVSS score: 4.3/10. Published 2022-11-25.
How severe is CVE-2022-39339?: Medium severity. CVSS v3 base score is 4.3 out of 10.