Description
XWiki Platform is a generic wiki platform. Starting in version 11.8-rc-1 and prior to versions 14.4.8, 14.10.6, and 15.2, `Mail.MailConfig` can be edited by any logged-in user by default. Consequently, they can change the mail obfuscation configuration and view and edit the mail sending configuration, including the smtp domain name and credentials. The problem has been patched in XWiki 14.4.8, 14.10.6, and 15.1. As a workaround, the rights of the `Mail.MailConfig` page can be manually updated so that only a set of trusted users can view, edit and delete it (e.g., the `XWiki.XWikiAdminGroup` group).
Remediation
References
https://github.com/xwiki/xwiki-platform/commit/8910b8857d3442d2e8142f655fdc0512930354d1
https://github.com/xwiki/xwiki-platform/commit/d28d7739089e1ae8961257d9da7135d1a01cb7d4
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-g75c-cjr6-39mc
https://jira.xwiki.org/browse/XWIKI-20519
https://jira.xwiki.org/browse/XWIKI-20671
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