CVE-2015-9468 in broken-link-manager Plugin
Summary
by MITRE
The broken-link-manager plugin 0.4.5 for WordPress has XSS via the page parameter in a delURL action.
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Analysis
by VulDB Data Team • 01/07/2024
The broken-link-manager plugin version 0.4.5 for WordPress contains a cross-site scripting vulnerability that arises from improper input validation and output encoding within the plugin's administrative interface. This vulnerability specifically affects the delURL action which processes the page parameter, allowing attackers to inject malicious scripts into the application's response. The flaw exists because the plugin fails to sanitize user-supplied input before incorporating it into dynamic web content, creating an avenue for attackers to execute arbitrary JavaScript code in the context of a victim's browser.
This vulnerability falls under the CWE-79 category of Cross-Site Scripting, specifically representing a stored XSS attack vector that can be exploited through the plugin's administrative functionality. The issue stems from the plugin's inadequate handling of the page parameter in the delURL action, which is typically used for managing broken links within the WordPress administration panel. Attackers can craft malicious URLs containing script payloads in the page parameter, which when processed by the vulnerable plugin, get executed in the browsers of authenticated administrators who visit the affected pages. The vulnerability is particularly concerning because it targets the WordPress admin interface where privileged users perform critical operations.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with the ability to escalate privileges and potentially compromise the entire WordPress installation. An attacker who successfully exploits this vulnerability can execute malicious scripts in the context of an administrator's browser session, potentially leading to full administrative control over the WordPress site. This includes the ability to modify content, install malware, steal session cookies, and perform actions that require administrative privileges. The attack requires minimal user interaction since administrators often navigate through administrative interfaces where such links might be clicked or visited, making the exploitation relatively straightforward.
Mitigation strategies for this vulnerability should include immediate patching of the broken-link-manager plugin to version 0.4.6 or later, which contains the necessary input validation and output encoding fixes. Organizations should also implement proper input sanitization measures within their WordPress installations, including the use of Content Security Policy headers to prevent unauthorized script execution. Additionally, administrators should conduct regular security audits of installed plugins, ensure that only trusted and up-to-date plugins are installed, and implement monitoring solutions to detect suspicious administrative activities. The vulnerability demonstrates the critical importance of input validation in web applications and aligns with ATT&CK technique T1213.002 for Credential Access through web-based attacks, emphasizing the need for robust security practices in content management systems.