CVE-2018-20028: Contao Information Disclosure via Access Control Flaws
6.5
CVSS Score
3.0
Basic Information
CVE ID
GHSA ID
EPSS Score
0.51531%
CWE
Published
5/13/2022
Updated
4/25/2024
KEV Status
No
Technology
PHP
PHPTechnical Details
CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| contao/contao | composer | >= 3.0.0, < 3.5.37 | 3.5.37 |
| contao/contao | composer | >= 4.6.0, < 4.6.11 | 4.6.11 |
| contao/contao | composer | >= 4.4.0, < 4.4.31 | 4.4.31 |
Vulnerability Intelligence
Miggo AI
Miggo AIRoot Cause Analysis
The vulnerability stemmed from missing access control checks in Data Container (DCA) permission validation functions. The commit diff shows critical additions of ID-in-root-array checks for 'select' and 'paste' actions across multiple DCA files (tl_calendar_events, tl_news, etc.), which directly correlate with the described vulnerability vectors. The DC_Table.php changes fix root node handling that previously allowed unauthorized parent view access. The tl_page.php modifications address the pagemounts issue where empty user mounts led to unrestricted access. These functions were clearly modified to add missing access controls in the patch, confirming their vulnerability.