CVE-2020-21053 : Security Advisory and Response
Learn about CVE-2020-21053, a Cross Site Scripting (XSS) vulnerability in FusionPBX 4.5.7 allowing remote attackers to inject malicious scripts. Find mitigation steps and preventive measures here.
FusionPBX 4.5.7 is affected by a Cross Site Scripting (XSS) vulnerability that allows remote attackers to inject malicious scripts or HTML code via an unsanitized 'query_string' variable in app\devices\device_imports.php.
Understanding CVE-2020-21053
This CVE entry describes a security issue in FusionPBX version 4.5.7 that can be exploited by attackers to execute XSS attacks.
What is CVE-2020-21053?
CVE-2020-21053 is a Cross Site Scripting (XSS) vulnerability found in FusionPBX 4.5.7, enabling malicious users to insert unauthorized scripts or HTML code through an unsanitized 'query_string' parameter.
The Impact of CVE-2020-21053
The vulnerability in FusionPBX 4.5.7 could lead to remote attackers executing arbitrary scripts or injecting malicious content into web pages, potentially compromising user data and system integrity.
Technical Details of CVE-2020-21053
This section provides more in-depth technical insights into the CVE-2020-21053 vulnerability.
Vulnerability Description
The XSS flaw in FusionPBX 4.5.7 allows remote attackers to manipulate the 'query_string' parameter in app\devices\device_imports.php, leading to the injection of malicious scripts or HTML code.
Affected Systems and Versions
- Product: FusionPBX
- Version: 4.5.7
Exploitation Mechanism
Attackers exploit the unsanitized 'query_string' variable in the 'device_imports.php' script of FusionPBX 4.5.7 to inject and execute malicious web scripts or HTML content.
Mitigation and Prevention
Protecting systems from CVE-2020-21053 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Apply security patches or updates provided by FusionPBX promptly.
- Implement input validation mechanisms to sanitize user inputs and prevent XSS attacks.
Long-Term Security Practices
- Regularly monitor and audit web applications for vulnerabilities like XSS.
- Educate developers and users on secure coding practices to mitigate XSS risks.
Patching and Updates
- FusionPBX users should apply the patch released by the vendor to address the XSS vulnerability in version 4.5.7.