CVE-2021-21319 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-21319, a Medium severity vulnerability in Galette < 0.9.5 allowing attackers to execute malicious JavaScript code. Learn mitigation steps here.
Galette is a membership management web application geared towards non-profit organizations. In versions prior to 0.9.5, a vulnerability allows the storage of malicious JavaScript code that can later be displayed on the self-subscription page. The issue can also lead to the execution of malicious code on the login and retrieve password pages.
Understanding CVE-2021-21319
This CVE identifies several stored XSS vulnerabilities in Galette versions prior to 0.9.5.
What is CVE-2021-21319?
CVE-2021-21319 refers to the ability to store and execute malicious JavaScript code on vulnerable versions of the Galette membership management web application.
The Impact of CVE-2021-21319
The vulnerabilities allow threat actors to execute stored XSS attacks, potentially compromising the confidentiality of user data with a CVSS base score of 6.8 (Medium severity).
Technical Details of CVE-2021-21319
In this section, we delve into the technical aspects of the vulnerability.
Vulnerability Description
The flaw permits the insertion of malicious JavaScript code, leading to stored XSS attacks on the self-subscription, login, and retrieve password pages.
Affected Systems and Versions
Galette versions earlier than 0.9.5 are affected by these vulnerabilities.
Exploitation Mechanism
Attackers can exploit this vulnerability by storing and executing malicious JavaScript code on the impacted pages.
Mitigation and Prevention
To secure systems from the risks posed by CVE-2021-21319, follow these essential mitigation strategies.
Immediate Steps to Take
Disable the self-subscription feature on Galette versions earlier than 0.9.5. Apply the necessary patches and updates to mitigate the risk of stored XSS attacks.
Long-Term Security Practices
Implement secure coding practices, input validation mechanisms, and regular security audits to prevent similar vulnerabilities in the future.
Patching and Updates
Ensure that you update Galette to version 0.9.5 or later to address and eliminate the stored XSS vulnerabilities.