Auth bypass in Xwiki Openid Connect
CVE-2022-39387
XWiki OIDC has various tools to manipulate OpenID Connect protocol in XWiki. Prior to version 1.29.1, even if a wiki has an OpenID provider configured through its xwiki.properties, it is possible to provide a third party provider its details through request parameters. One can then bypass the XWiki authentication altogether by specifying its own provider through the oidc.endpoint.* request parameters (or by using an XWiki-based OpenID provider with oidc.xwikiprovider. With the same approach, one could also provide a specific group mapping through oidc.groups.mapping that would make his user automatically part of the XWikiAdminGroup. This issue has been patched, please upgrade to 1.29.1. There is no workaround, an upgrade of the authenticator is required.
Vulnerability class: Broken Authentication
EPSS: 0.009 (55.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Xwiki Openid_connect
- Xwiki-contrib Oidc — versions < 1.29.1
Weakness classification (CWE)
References
- security-advisories@github.com (Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory)
- security-advisories@github.com (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2022-39387?
- CVE-2022-39387 is a critical-severity vulnerability in Xwiki Openid Connect, classified under Improper Authentication. CVSS score: 9.1/10. Published 2022-11-04.
- How severe is CVE-2022-39387?
- Critical severity. CVSS v3 base score is 9.1 out of 10.