CVE-2021-41801 Explained : Impact and Mitigation
Learn about CVE-2021-41801 affecting the ReplaceText extension in MediaWiki, allowing blocked users to run replace jobs despite restrictions. Find mitigation steps and patch details here.
The ReplaceText extension through 1.41 for MediaWiki is affected by an Incorrect Access Control vulnerability that allows blocked users to still run replace jobs.
Understanding CVE-2021-41801
What is CVE-2021-41801?
The CVE-2021-41801 vulnerability pertains to the ReplaceText extension in MediaWiki, enabling blocked users to execute replace jobs despite being blocked.
The Impact of CVE-2021-41801
The vulnerability allows blocked users to bypass restrictions and execute replace jobs, potentially affecting the integrity and security of the MediaWiki instance.
Technical Details of CVE-2021-41801
Vulnerability Description
The ReplaceText extension through 1.41 for MediaWiki is susceptible to Incorrect Access Control. Blocked users can still initiate replace jobs, leading to unauthorized changes.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions up to and including 1.41
Exploitation Mechanism
Due to an Incorrect Access Control flaw, blocked users can submit replace jobs, which may be executed at a later time despite their block status.
Mitigation and Prevention
Immediate Steps to Take
- Review and apply software patches promptly
- Monitor user activities for suspicious behavior
- Implement access controls to restrict unauthorized actions
Long-Term Security Practices
- Regularly update and patch software applications
- Conduct security training for users to increase awareness
Patching and Updates
Apply the latest patches and updates for the ReplaceText extension in MediaWiki to address the Incorrect Access Control vulnerability.