In Concrete CMS below version 9.4.8, a user with permission to edit a page with element Legacy form can perform a stored XSS attack towards high-privilege accounts via the Question field.
The Concrete CMS security team thanks minhnn42, namdi and quanlna2 from VCSLab-Viettel Cyber Security for reporting.
{
"github_reviewed_at": "2026-03-04T21:36:26Z",
"github_reviewed": true,
"severity": "MODERATE",
"nvd_published_at": "2026-03-04T03:16:04Z",
"cwe_ids": [
"CWE-79"
]
}