Contao is an Open Source CMS. In affected versions an untrusted user can inject insert tags into the canonical tag, which are then replaced on the web page (front end). Users are advised to update to Contao 4.13.49, 5.3.15 or 5.4.3. Users unable to upgrade should disable canonical tags in the root page settings.
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Contao | Contao | 4.13.0 (including) | 4.13.49 (excluding) |
| Contao | Contao | 5.3.0 (including) | 5.3.15 (excluding) |
| Contao | Contao | 5.4.0 (including) | 5.4.3 (excluding) |