CVE-2020-29003 : Security Advisory and Response
Learn about CVE-2020-29003, a cross-site scripting (XSS) vulnerability in the PollNY extension for MediaWiki up to version 1.35, allowing attackers to execute malicious code via poll answer options.
The PollNY extension for MediaWiki through 1.35 allows XSS via an answer option for a poll question, entered during Special:CreatePoll or Special:UpdatePoll.
Understanding CVE-2020-29003
This CVE involves a cross-site scripting (XSS) vulnerability in the PollNY extension for MediaWiki.
What is CVE-2020-29003?
The vulnerability in the PollNY extension for MediaWiki through version 1.35 enables attackers to execute XSS attacks by inserting malicious code into the answer option for a poll question via Special:CreatePoll or Special:UpdatePoll.
The Impact of CVE-2020-29003
The exploitation of this vulnerability could lead to unauthorized access to sensitive information, manipulation of poll data, and potential compromise of user accounts within the affected MediaWiki instances.
Technical Details of CVE-2020-29003
The following technical details provide insight into the specifics of this CVE.
Vulnerability Description
The PollNY extension for MediaWiki through version 1.35 is susceptible to XSS attacks when users input malicious code into the answer option for a poll question via Special:CreatePoll or Special:UpdatePoll.
Affected Systems and Versions
- Product: MediaWiki
- Version: up to 1.35
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting malicious scripts and injecting them into the poll answer options, taking advantage of the lack of proper input validation.
Mitigation and Prevention
Protecting systems from CVE-2020-29003 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable the PollNY extension if not essential for operations.
- Implement input validation mechanisms to sanitize user inputs and prevent XSS attacks.
- Regularly monitor and audit poll content for any suspicious or malicious entries.
Long-Term Security Practices
- Stay informed about security updates and patches for MediaWiki and its extensions.
- Educate users on safe practices when creating and interacting with poll content.
Patching and Updates
- Apply patches or updates provided by MediaWiki to address the XSS vulnerability in the PollNY extension.