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

What is CVE-2018-20028?

CVE-2018-20028 is a medium-severity missing authorization vulnerability in n/a, published on 17 Apr 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Which versions are affected by CVE-2018-20028?

6 open source packages ship an affected version, including contao/contao. It affects 1 product.

Products include Contao Contao Cms.

How do I fix CVE-2018-20028?

Upgrade contao/contao to a fixed version for your release line: 3.5.37, 4.4.31 or 4.6.11.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2018-20028 being exploited?

There is no known exploitation of CVE-2018-20028 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2014-1860 Deserialization in n/a Critical 9.8
• CVE-2017-16558 Contao SQL injection in the backend and listing module Critical 9.8
• CVE-2019-10641 Contao Does Not Invalidate Existing Sessions When Password Changes Critical 9.8
• CVE-2019-10643 Contao Does Not Expire Tokens Correctly Critical 9.8
• CVE-2019-10642 Contao CSRF Token Bypass High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-q99w-j4mj-7hj8.