by Leo Feyer
Insert tag injection in forms
Date: 2020-09-24
CVE ID: CVE-2020-25768
Description
It is possible to inject insert tags in front end forms which will be replaced when the page is rendered.
Affected versions
Contao 4.0
Contao 4.1
Contao 4.2
Contao 4.3
Contao 4.4 up to 4.4.51
Contao 4.5
Contao 4.6
Contao 4.7
Contao 4.8
Contao 4.9 up to 4.9.5
Contao 4.10 up to 4.10.0
Suggested solution
Update to Contao 4.4.52, 4.9.6 or 4.10.1.
Workaround
Disable the front end login form and do not use form fields with array keys such as fieldname[]
.