CVE-2021-21312 : Vulnerability Insights and Analysis
Learn about CVE-2021-21312 affecting GLPI software. Explore the impact, technical details, affected versions, and mitigation steps for the stored XSS vulnerability.
GLPI before version 9.5.4 is vulnerable to stored Cross-Site Scripting (XSS) attacks, allowing malicious users to execute JavaScript payloads through the document upload function.
Understanding CVE-2021-21312
This CVE highlights a security flaw in GLPI that enables attackers to inject malicious scripts into the system via the document upload feature.
What is CVE-2021-21312?
GLPI, an open-source IT management software, is susceptible to stored XSS attacks when uploading documents, potentially leading to the execution of unauthorized scripts.
The Impact of CVE-2021-21312
The vulnerability poses a medium-level threat with a CVSS base score of 5.4. It requires high privileges and user interaction for exploitation, impacting system integrity.
Technical Details of CVE-2021-21312
This section delves into the specifics of the vulnerability, affected systems, and the method of exploitation.
Vulnerability Description
A lack of proper input sanitization in GLPI prior to version 9.5.4 allows attackers with document upload rights to insert JavaScript payloads, leading to stored XSS attacks.
Affected Systems and Versions
GLPI versions before 9.5.4 are affected by this vulnerability, emphasizing the importance of updating to secure releases.
Exploitation Mechanism
By manipulating the "Web Link" field during document upload, malicious users can inject scripts that get executed when interacting with the document.
Mitigation and Prevention
Protect your systems from CVE-2021-21312 by taking immediate remediation steps and adopting long-term security practices.
Immediate Steps to Take
Ensure that all users update GLPI to version 9.5.4 or above to mitigate the risk of stored XSS attacks via document uploads.
Long-Term Security Practices
Regularly monitor for security updates and educate users on safe document handling practices to prevent future XSS vulnerabilities.
Patching and Updates
Stay informed about security advisories from GLPI and promptly apply patches to address known vulnerabilities.