CVE-2025-4194

Vulnerability

Description The AlT Monitoring plugin for WordPress, up to version 1.0.3, lacks proper nonce validation on the ALT_Monitoring_edit page. This Cross-Site Request Forgery (CSRF) vulnerability occurs because the plugin does not check for a valid nonce when processing requests to update settings [1]. Nonces are security tokens that prevent unauthorized requests, and their absence allows attackers to forge requests on behalf of an authenticated administrator.

Exploitation

Method An unauthenticated attacker can exploit this flaw by crafting a malicious request that modifies plugin settings or injects malicious web scripts. To succeed, the attacker must trick a site administrator into performing an action, such as clicking on a crafted link or visiting a page hosting the exploit. The forged request would then be processed by the administrator's browser, leveraging their session to modify the plugin's configuration [description].

Impact

Successful exploitation enables the attacker to alter plugin settings and inject arbitrary web scripts (stored XSS) into the WordPress site. This could lead to further attacks, such as stealing administrator credentials, redirecting users to malicious sites, or executing other client-side attacks within the context of the site [description].

Mitigation

The AlT Monitoring plugin has been closed as of May 15, 2025, due to a security issue and is no longer available for download [1]. Users who have this plugin active should immediately remove it from their WordPress installations. No patched version exists; the only mitigation is to uninstall the plugin and consider an alternative solution.