CVE-2021-33513 : Security Advisory and Response
Learn about CVE-2021-33513, a critical XSS vulnerability in Plone versions up to 5.2.4 via inline_diff methods in Products.CMFDiffTool. Find out the impact, affected systems, and mitigation steps.
Plone through 5.2.4 allows XSS via the inline_diff methods in Products.CMFDiffTool.
Understanding CVE-2021-33513
This CVE identifies a cross-site scripting (XSS) vulnerability present in Plone versions up to 5.2.4.
What is CVE-2021-33513?
The vulnerability in Plone allows attackers to execute malicious scripts by utilizing the inline_diff methods in Products.CMFDiffTool, potentially compromising the security and integrity of the affected systems.
The Impact of CVE-2021-33513
If exploited, this XSS vulnerability could lead to unauthorized access, data theft, and the possibility of complete system control in the affected Plone installations.
Technical Details of CVE-2021-33513
This section outlines specific technical details related to the CVE.
Vulnerability Description
The XSS issue stems from improper input validation in the inline_diff methods in Products.CMFDiffTool, enabling attackers to inject and execute malicious scripts.
Affected Systems and Versions
All Plone installations up to version 5.2.4 are impacted by this vulnerability, exposing them to potential XSS attacks.
Exploitation Mechanism
By crafting and submitting specially-crafted inputs through the inline_diff methods, threat actors can bypass security measures and execute arbitrary code on vulnerable Plone instances.
Mitigation and Prevention
Protecting systems from CVE-2021-33513 requires immediate action and long-term security measures.
Immediate Steps to Take
- Apply the security hotfix released by Plone to address the XSS vulnerability promptly.
- Implement strict input validation mechanisms to mitigate the risk of XSS attacks.
Long-Term Security Practices
- Regularly update Plone installations to the latest secure versions to prevent known vulnerabilities.
- Conduct security assessments and penetration testing to identify and remediate any existing security weaknesses.
Patching and Updates
Stay informed about security advisories from Plone and promptly install patches and updates to ensure a secure environment.