CVE-2021-3313 : Security Advisory and Response
Learn about CVE-2021-3313, a stored Cross-Site Scripting (XSS) vulnerability in Plone CMS up to version 5.2.4. Understand the impact, technical details, and mitigation steps.
Plone CMS until version 5.2.4 has a stored Cross-Site Scripting (XSS) vulnerability that affects the user's input data, allowing attackers to execute JavaScript in the victim's browser.
Understanding CVE-2021-3313
This CVE involves a stored XSS vulnerability in Plone CMS, impacting versions up to 5.2.4.
What is CVE-2021-3313?
Plone CMS up to version 5.2.4 is susceptible to a stored XSS flaw in the user fullname property and the file upload feature. Attackers can inject malicious code that is then executed when a vulnerable page is accessed.
The Impact of CVE-2021-3313
Exploitation of this vulnerability can lead to unauthorized and potentially malicious execution of JavaScript code within the context of the user's browser, posing a significant security risk.
Technical Details of CVE-2021-3313
This section provides in-depth technical insights into the vulnerability.
Vulnerability Description
The XSS vulnerability in Plone CMS occurs due to improper encoding of user input data before echoing it back, enabling the execution of injected scripts as code in the victim's browser.
Affected Systems and Versions
Plone CMS versions up to 5.2.4 are impacted by this vulnerability.
Exploitation Mechanism
Attackers can craft malicious payloads containing JavaScript code and trick victims into accessing a compromised page, leading to code execution in their browsers.
Mitigation and Prevention
Protecting systems from CVE-2021-3313 involves implementing appropriate security measures.
Immediate Steps to Take
Users are advised to update their Plone CMS installations to version 5.2.4 or apply security patches to mitigate the risk of exploitation.
Long-Term Security Practices
Incorporating secure coding practices and regularly updating software components can help prevent XSS vulnerabilities and enhance overall cybersecurity posture.
Patching and Updates
Stay informed about security advisories and apply patches promptly to address known vulnerabilities and strengthen system defenses.