CVE-2022-39387
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.97%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.97% probability · 60th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- xwiki/openid connect
- Source
- security-advisories@github.com
References
- https://github.com/xwiki-contrib/oidc/commit/0247af1417925b9734ab106ad7cd934ee870ac89Patch, Third Party Advisory
- https://github.com/xwiki-contrib/oidc/security/advisories/GHSA-m7gv-v8xx-v47wThird Party Advisory
- https://jira.xwiki.org/browse/OIDC-118Issue Tracking, Vendor Advisory
- https://github.com/xwiki-contrib/oidc/commit/0247af1417925b9734ab106ad7cd934ee870ac89Patch, Third Party Advisory
- https://github.com/xwiki-contrib/oidc/security/advisories/GHSA-m7gv-v8xx-v47wThird Party Advisory
- https://jira.xwiki.org/browse/OIDC-118Issue Tracking, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.