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CVE-2021-38751 Scanner

Detects 'Host Header Injection' vulnerability in ExponentCMS affects v. 2.6 and below.


Short Info



Single Scan

Single Scan

Can be used by

Asset Owner

Estimated Time

10 sec

Scan only one




ExponentCMS is a content management system utilized for website building and designing purposes. It is an open-source software used for creating dynamic websites and web applications. It provides a range of features such as templates, themes, and plugins. With its easy-to-use interface, website owners can manage all aspects of their website with ease. ExponentCMS is a popular software choice for businesses and individuals who wish to create a professional-looking website, with resources, and support provided by the CMS community of developers.

The CVE-2021-38751 vulnerability is a critical vulnerability that was detected in ExponentCMS 2.6 and earlier versions, in the /exponent_constants.php file. This vulnerability is caused by a flaw in the HTTP Host header of the CMS. Attackers can exploit this vulnerability by modifying the HTTP header to change the links on the website to an arbitrary value. This makes it a potential target for Man-In-The-Middle (MITM) attacks, where an attacker can manipulate the link to lead the user to a third-party website that could be harmful.

When exploited, the CVE-2021-38751 vulnerability can lead to unauthorized access to sensitive data such as user credentials, personal information, and financial information. Website owners can lose control over their websites, and visitors could potentially be redirected to untrusted sites, putting them at risk of malware and phishing attacks. If this vulnerability is exploited by a sophisticated attacker, the damage caused by the breach could be severe, resulting in reputational damage, financial loss, and even legal repercussions.

In conclusion, detecting and mitigating vulnerabilities is crucial for website owners to protect their digital assets, secure user data, and maintain the trust of their audience. Fortunately, offers an efficient way for website owners to stay informed about potential vulnerabilities in their digital assets. With the pro features of the platform, they can quickly and easily stay up to date with the latest patches and security updates, and implement security measures to prevent malicious attacks on their websites. Don't wait for an attack to happen before taking action, stay informed, and safeguard your digital assets today.



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