CVE-2020-18451 in DamiCMS
Summary
by MITRE • 08/12/2021
Cross Site Scripting (XSS) vulnerability exists in DamiCMS v6.0.6 via the title parameter in the doadd function in LabelAction.class.php.
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Analysis
by VulDB Data Team • 08/17/2021
The vulnerability CVE-2020-18451 represents a cross site scripting flaw in DamiCMS version 6.0.6 that specifically targets the title parameter within the doadd function of the LabelAction.class.php file. This type of vulnerability falls under the CWE-79 category, which defines cross site scripting as a code injection attack that occurs when an application includes untrusted data in a new web page without proper validation or escaping. The flaw enables attackers to inject malicious scripts into web pages viewed by other users, making it a critical security concern for web applications that process user input.
The technical execution of this vulnerability occurs through the improper handling of user-supplied input in the LabelAction.class.php file where the doadd function processes data submission. When users submit content through the label management interface, the title parameter is not adequately sanitized or escaped before being rendered back to the browser. This allows an attacker to craft malicious input containing script tags or other malicious code that gets executed in the context of other users' browsers. The vulnerability is particularly dangerous because it leverages the application's legitimate functionality to deliver malicious payloads rather than exploiting a direct system flaw.
The operational impact of CVE-2020-18451 extends beyond simple data theft or defacement, as it can enable sophisticated attacks such as session hijacking, credential theft, or redirection to malicious sites. Attackers can exploit this vulnerability to steal user sessions, modify content, or perform actions on behalf of authenticated users. The vulnerability affects the entire DamiCMS user base that has not applied the relevant security patches, potentially compromising the integrity of the content management system and the data stored within it. The attack vector is relatively simple, requiring only the ability to submit content through the application's interface, making it accessible to various threat actors including those with limited technical expertise.
Security mitigations for this vulnerability should include immediate patching of the DamiCMS application to version 6.0.7 or later, which contains the necessary fixes for the XSS vulnerability. Additionally, developers should implement comprehensive input validation and output escaping mechanisms throughout the application, particularly in areas where user input is processed and rendered back to users. The principle of least privilege should be applied to restrict the capabilities of user-submitted content, and content security policies should be implemented to prevent unauthorized script execution. Organizations should also consider implementing web application firewalls and regular security assessments to identify similar vulnerabilities in their systems. This vulnerability aligns with ATT&CK technique T1566 which covers social engineering attacks, as the XSS vulnerability can be exploited through crafted user input to manipulate applications and gain unauthorized access to systems or data.