2021-24427 | W3 Total Cache Plugin CDN Setting cross site scripting

By Max On Jul 15, 2021

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2.3	$0-$5k	0.16

A vulnerability was found in W3 Total Cache Plugin up to 2.1.2. It has been classified as problematic. This affects some unknown functionality of the component CDN Setting Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. This is going to have an impact on 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. The summary by CVE is:

The W3 Total Cache WordPress plugin before 2.1.3 did not sanitise or escape some of its CDN settings, allowing high privilege users to use JavaScript in them, which will be output in the page, leading to an authenticated Stored Cross-Site Scripting issue

The weakness was released 07/13/2021. The advisory is shared at wpscan.com. This vulnerability is uniquely identified as CVE-2021-24427 since 01/14/2021. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation needs additional levels of successful authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.1.3 eliminates this vulnerability.

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