2021-34644 | Multiplayer Games Plugin multiplayergames.php cross site scripting
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A vulnerability has been found in Multiplayer Games Plugin up to 3.7 on WordPress (WordPress Plugin) and classified as problematic. This vulnerability affects an unknown code of the file ~/multiplayergames.php. The manipulation of the argument
$_SERVER['PHP_SELF'] with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. As an impact it is known to affect integrity. An attacker might be able to inject arbitrary html and script code into the web site. This would alter the appearance and would make it possible to initiate further attacks against site visitors. CVE summarizes:
The Multiplayer Games WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER[‘PHP_SELF’] in the ~/multiplayergames.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 3.7.
The weakness was published 08/17/2021. The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2021-34644 since 06/10/2021. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.
Applying a patch is able to eliminate this problem. The bugfix is ready for download at plugins.trac.wordpress.org.
VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1
Status: Not defined
0-Day Time: 🔒
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