CVE-2018-0699 in YukiWiki
Summary
by MITRE
Cross-site scripting vulnerability in YukiWiki 2.1.3 and earlier allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 04/13/2020
The CVE-2018-0699 vulnerability represents a critical cross-site scripting flaw discovered in YukiWiki version 2.1.3 and earlier implementations. This vulnerability falls under the CWE-79 category, which specifically addresses cross-site scripting attacks where malicious scripts can be injected into web applications. The flaw exists within the wiki software's handling of user input and output sanitization mechanisms, creating an environment where remote attackers can execute arbitrary web scripts or HTML code within the context of other users' browsers.
The technical nature of this vulnerability stems from insufficient validation and sanitization of user-supplied data within the YukiWiki application. Attackers can exploit this weakness by crafting malicious input that gets processed and displayed without proper escaping or encoding, allowing the injected scripts to execute when other users view the affected content. The unspecified vectors suggest that multiple input points within the application may be vulnerable, potentially including page titles, content fields, or parameter handling mechanisms. This broad attack surface increases the exploitability and potential impact of the vulnerability.
The operational impact of CVE-2018-0699 extends beyond simple script execution, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, defacement of wiki content, and redirection to malicious sites. When attackers successfully exploit this vulnerability, they can establish persistent access to user sessions, potentially compromising sensitive information stored within the wiki environment. The vulnerability particularly affects collaborative wiki environments where multiple users contribute content, as the injected scripts can target any user who views the compromised pages, creating a widespread security risk across the entire user base.
Organizations utilizing affected YukiWiki versions should prioritize immediate remediation through patch updates from the software vendor, as this vulnerability directly violates security principles outlined in the OWASP Top Ten and aligns with ATT&CK technique T1566 for initial access through web application attacks. Mitigation strategies should include implementing proper input validation, output encoding, and content security policies to prevent script execution. Additionally, administrators should consider deploying web application firewalls and monitoring for suspicious user input patterns. The vulnerability demonstrates the critical importance of maintaining up-to-date software versions and implementing comprehensive security testing procedures to identify and remediate similar weaknesses in web applications.