CVE-2022-39387

CVE-2022-39387 is a critical authentication bypass vulnerability affecting XWiki OIDC versions prior to 1.29.1. Attackers can manipulate OpenID Connect parameters to specify a third-party provider, bypassing XWiki authentication entirely, and potentially gain administrative privileges by mapping their user to the XWikiAdminGroup. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, leading to high confidentiality impact. There is no known active exploitation, public exploit code, or Metasploit/Nuclei modules, though it has garnered significant community discussion with 10 mentions.