6.5

CVSS Score

3.0

-

CVSS Score

Basic Information

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CVE-2018-20028

CVE-2018-20028: Contao Information Disclosure via Access Control Flaws

Contao 3.x before 3.5.37, 4.4.x before 4.4.31 and 4.6.x before 4.6.11 has Incorrect Access Control.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2018-20028

CVE-2018-20028:

6.5

CVSS Score

3.0

-

CVSS Score

Basic Information

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Technical Details

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

Technical Details

Vulnerability Intelligence
Miggo AI

Root 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.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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