If BBCode is enabled for comments, users can inject CSS styles.
Update to Contao 4.13.40 or 5.3.4.
Disable BBCode for comments.
https://contao.org/en/security-advisories/insufficient-bbcode-sanitization
If you have any questions or comments about this advisory, open an issue in contao/contao.
{
"github_reviewed_at": "2024-04-09T18:52:54Z",
"github_reviewed": true,
"severity": "MODERATE",
"nvd_published_at": "2024-04-09T14:15:08Z",
"cwe_ids": [
"CWE-74"
]
}