It's possible to make XWiki create many new schemas and fill them with tables just by using a crafted user identifier in the login form.
The problem has been patched in XWiki 13.10.8, 14.6RC1 and 14.4.2.
The only workarounds for this are:
https://jira.xwiki.org/browse/XWIKI-19886
If you have any questions or comments about this advisory:
{
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2022-11-21T22:36:49Z",
"nvd_published_at": "2022-11-23T21:15:00Z",
"severity": "HIGH"
}