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CVE-2017-8811 Explained : Impact and Mitigation

Learn about CVE-2017-8811 where HTML mangling attacks are possible in MediaWiki versions before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 due to a vulnerability.

HTML mangling attacks are possible in MediaWiki versions prior to 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 due to the absence of raw message parameter expansion implementation.

Understanding CVE-2017-8811

HTML mangling attacks are a vulnerability present in specific versions of MediaWiki that can lead to security risks.

What is CVE-2017-8811?

The implementation of raw message parameter expansion in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows HTML mangling attacks.

The Impact of CVE-2017-8811

        HTML mangling attacks are possible in affected versions of MediaWiki.

Technical Details of CVE-2017-8811

HTML mangling attacks can have severe consequences on the security of MediaWiki instances.

Vulnerability Description

The absence of raw message parameter expansion implementation in MediaWiki versions prior to 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 makes HTML mangling attacks possible.

Affected Systems and Versions

        Product: MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2

Exploitation Mechanism

        Attackers can exploit this vulnerability to manipulate HTML content in affected MediaWiki versions.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigate the risks associated with CVE-2017-8811.

Immediate Steps to Take

        Update MediaWiki to versions 1.27.4, 1.28.3, or 1.29.2 to address the vulnerability.
        Monitor and restrict user input to prevent malicious HTML manipulation.

Long-Term Security Practices

        Regularly update software and apply security patches to prevent future vulnerabilities.
        Educate users on safe practices to minimize the risk of HTML manipulation attacks.

Patching and Updates

        Stay informed about security advisories and promptly apply patches to secure MediaWiki installations.

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