CVE-2016-1000149 in simpel-reserveren Plugin
Summary
by MITRE
Reflected XSS in wordpress plugin simpel-reserveren v3.5.2
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Analysis
by VulDB Data Team • 07/24/2019
The vulnerability identified as CVE-2016-1000149 represents a reflected cross-site scripting flaw within the simple-reserveren wordpress plugin version 3.5.2. This issue arises from inadequate input validation and output escaping mechanisms within the plugin's codebase, specifically affecting how user-supplied data is processed and displayed on web pages. The vulnerability enables attackers to inject malicious scripts into web pages viewed by other users, potentially compromising their sessions and executing unauthorized actions. The affected plugin, which provides reservation functionality for wordpress websites, fails to properly sanitize user inputs before incorporating them into dynamic web content, creating an avenue for malicious exploitation.
The technical implementation of this reflected XSS vulnerability occurs when the plugin processes user-provided parameters through HTTP request variables without adequate sanitization. When a user visits a maliciously crafted URL containing script code within the plugin's parameters, the web application reflects this code back to the user's browser, executing the malicious script within the context of the vulnerable website. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws, and it aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments or links. The vulnerability exists because the plugin does not employ proper output encoding or validation techniques when handling input data, particularly in areas where reservation data or user parameters are processed.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to steal session cookies, perform unauthorized actions on behalf of users, or redirect victims to malicious websites. An attacker could craft a phishing link that, when clicked by an authenticated user, would execute malicious JavaScript code within the user's browser session. This could lead to complete account takeover, data exfiltration, or the deployment of additional malware through the compromised user's browser. The vulnerability affects any wordpress installation using the simple-reserveren plugin version 3.5.2, making it particularly dangerous as it could be exploited across multiple websites simultaneously. The reflected nature of the vulnerability means that the malicious payload must be delivered through a link or email, making it susceptible to social engineering attacks that target users with legitimate access to the vulnerable system.
Mitigation strategies for this vulnerability should include immediate patching of the simple-reserveren plugin to version 3.5.3 or later, which contains the necessary security fixes. System administrators should implement proper input validation and output encoding mechanisms throughout the wordpress environment, ensuring that all user inputs are sanitized before processing. The implementation of Content Security Policy headers can provide additional protection against reflected XSS attacks by restricting the sources from which scripts can be loaded. Network monitoring should be enhanced to detect suspicious URL patterns and potential exploitation attempts. Security hardening measures should include regular security audits of installed plugins, implementing web application firewalls, and maintaining up-to-date security practices. Organizations should also consider implementing automated patch management systems to ensure timely deployment of security updates. The vulnerability demonstrates the critical importance of validating and sanitizing all user inputs as outlined in OWASP Top Ten security practices and should be addressed immediately to prevent potential exploitation by threat actors.