CVE-2018-8973 in OTCMS
Summary
by MITRE
OTCMS 3.20 allows XSS by adding a keyword or link to an article, as demonstrated by an admin/keyWord_deal.php?mudi=add request.
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Analysis
by VulDB Data Team • 01/16/2020
The vulnerability identified as CVE-2018-8973 affects OTCMS version 3.20 and represents a cross-site scripting flaw that enables unauthorized attackers to inject malicious scripts into web applications. This vulnerability specifically manifests when administrators process keywords or links within article management functionality, creating a persistent threat vector that can compromise the integrity of the content management system. The attack surface is particularly concerning as it targets administrative functions, potentially allowing threat actors to escalate privileges or manipulate content in ways that could affect entire website operations.
The technical implementation of this vulnerability stems from insufficient input validation and output sanitization within the admin/keyWord_deal.php endpoint. When administrators add keywords or links through the mudi=add parameter, the application fails to properly sanitize user-supplied data before rendering it back to the browser. This lack of proper data sanitization creates an environment where malicious payloads can be executed in the context of other users' browsers, particularly administrators who interact with the affected functionality. The vulnerability is classified as a classic reflected cross-site scripting issue where user input flows directly into the application's output without adequate encoding or validation mechanisms.
From an operational perspective, this vulnerability presents significant risks to organizations using OTCMS 3.20 as it allows attackers to execute arbitrary JavaScript code within the browser context of authenticated users. An attacker could potentially steal session cookies, perform unauthorized actions on behalf of administrators, or redirect users to malicious sites. The impact extends beyond simple data theft as the vulnerability could enable privilege escalation attacks, allowing attackers to gain administrative control over the CMS and subsequently compromise the entire web application infrastructure. The vulnerability's exploitation requires minimal technical skill and can be automated, making it particularly dangerous in environments where administrators regularly interact with keyword management features.
The attack pattern for this vulnerability aligns with common exploit frameworks that leverage administrative functionality to establish persistent access. According to the ATT&CK framework, this represents a technique categorized under "Command and Control" and "Credential Access" where attackers can establish covert communication channels and potentially escalate privileges through compromised administrative sessions. The CWE classification for this vulnerability would fall under CWE-79: Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly sanitize user input before incorporating it into web page output. Organizations should implement immediate mitigations including input validation, output encoding, and privilege separation measures to prevent exploitation of this vulnerability.
Mitigation strategies should focus on implementing comprehensive input validation mechanisms that sanitize all user-supplied data before processing, particularly within administrative interfaces. Organizations should deploy web application firewalls to detect and block malicious payloads attempting to exploit this vulnerability, while also ensuring that all administrative functions implement proper output encoding to prevent script execution. Regular security updates and patches should be applied immediately upon vendor availability, as this vulnerability represents a critical security flaw that can be exploited without significant technical expertise. Additionally, implementing role-based access controls and monitoring administrative activities can help detect potential exploitation attempts and provide early warning of compromise. The vulnerability demonstrates the critical importance of securing administrative interfaces and implementing defense-in-depth strategies that protect against both known and emerging threats in content management systems.