Advisories for Composer/Contao/Core package

PHP object injection vulnerability was identified in contao/core due to untrusted data being passed to deserialize() function.

contao/core versions 2.x prior to 2.11.17 and 3.x prior to 3.2.9 are vulnerable to arbitrary code execution on the server due to insufficient input validation. In fact, attackers can remove or change pathconfig.php by entering a URL, meaning that the entire Contao installation will no longer be accessible or malicious code can be executed.

Both the search filter in the back end and the "listing" module in the front end are vulnerable to SQL injection. To exploit the vulnerability in the back end, a back end user has to be logged in, whereas the front end vulnerability can be exploited by anyone.

Contao has a Weak Password Recovery Mechanism for a Forgotten Password.

Contao allows Use of a Key Past its Expiration Date.

Contao allows CSRF.

There's a Cross-Site Scripting (XSS) vulnerability in system log of back end. With a manipulated request, an attacker can implant a script which is executed when a logged in back end user opens the system log. The attacker themselves does not have to be logged in.

There's a XSS vulnerability is in the "unsubscribe" module of the newsletter extension and it can easily be exploited by anyone in the front end. If you are not using the newsletter extension or the "unsubscribe" module, your installation is not affected by the vulnerability.

Contao allows remote attackers to include and execute arbitrary local PHP files via a crafted parameter in a URL, aka Directory Traversal.

Directory traversal vulnerability in Contao allows remote authenticated back end users to view files outside their file mounts or the document root via unspecified vectors.

Cross-site scripting (XSS) vulnerability in flash/FlashMediaElement.as in MediaElement.js allows remote attackers to inject arbitrary web script or HTML via an obfuscated form of the jsinitfunction parameter, as demonstrated by jsinitfunctio%gn."

Insufficient input validation allows for code injection and remote execution.

PHP object injection vulnerability allows for arbitrary code execution.