CVE-2026-8909 in WpMobi Plugin
Summary
by MITRE • 06/09/2026
The WpMobi plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 0.0.3. This is due to missing or incorrect nonce validation on the handleSaveGeneralSettings function. This makes it possible for unauthenticated attackers to modify the plugin's General Settings and inject arbitrary web scripts into the administrator's browser via the unescaped app_name attribute reflection via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. The injected script executes even when the supplied app_name value fails validation and is not persisted to the database, because the form is re-rendered with the attacker-supplied in-memory value on validation failure.
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Analysis
by VulDB Data Team • 06/09/2026
The wpMobi plugin for WordPress presents a critical cross-site request forgery vulnerability that affects all versions through 0.0.3, representing a significant security weakness in the plugin's configuration management system. This vulnerability stems from inadequate nonce validation within the handleSaveGeneralSettings function, which serves as the primary mechanism for protecting administrative settings modifications. The absence of proper authentication checks and validation tokens creates an exploitable pathway for unauthenticated attackers to manipulate the plugin's core configuration parameters, potentially compromising the entire WordPress installation through malicious script injection.
The technical flaw manifests through the improper handling of the app_name attribute within the plugin's settings interface, where input values are reflected back to the browser without adequate sanitization or escaping mechanisms. This reflection vulnerability occurs when the form is re-rendered upon validation failure, allowing attackers to inject arbitrary JavaScript code that executes within the administrator's browser context. The vulnerability operates at the application layer and aligns with CWE-352, which specifically addresses cross-site request forgery weaknesses in web applications. The reflected nature of the attack vector means that the malicious script executes immediately upon page reload, even though the invalid input is not persisted to the database, making this particularly dangerous as it can be triggered repeatedly without leaving persistent traces.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to perform unauthorized administrative actions that could lead to complete system compromise. When administrators are tricked into clicking malicious links or visiting compromised pages, the injected scripts can execute with elevated privileges, potentially allowing attackers to modify plugin settings, steal session cookies, redirect users to malicious sites, or even install additional malware. The vulnerability is particularly concerning because it requires minimal user interaction beyond clicking a link, making it highly effective for social engineering attacks. This weakness falls under ATT&CK technique T1059.007 for JavaScript and T1566 for phishing attacks, demonstrating how this vulnerability can be leveraged in broader attack chains.
Mitigation strategies must focus on implementing proper nonce validation mechanisms and input sanitization within the plugin's settings handling functions. The most effective immediate solution involves adding robust nonce verification to the handleSaveGeneralSettings function, ensuring that all administrative actions require valid authentication tokens before processing. Additionally, all user-supplied input should be properly escaped and validated before being reflected back to the browser, implementing proper output encoding to prevent script execution. Organizations should also consider implementing Content Security Policy headers to limit script execution capabilities and monitor for suspicious administrative activity. Regular security audits and input validation testing should be conducted to identify similar vulnerabilities in other plugin components, while users should be educated about the risks of clicking untrusted links and the importance of keeping plugins updated to their latest secure versions.