CVE-2026-14919 in ShopMonitor.io Plugin
Summary
by MITRE • 07/31/2026
The ShopMonitor.io WordPress plugin before 1.2.0 does not properly restrict its email-rerouting test mode, gating it behind a trusted-source check that is satisfiable with client-supplied request headers, allowing unauthenticated attackers to redirect outgoing emails, including the WordPress administrator password-reset email, to an address they control and take over the administrator account.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/31/2026
The vulnerability in ShopMonitor.io WordPress plugin versions prior to 1.2.0 represents a critical security flaw that undermines the integrity of email communication within WordPress environments. This issue stems from inadequate input validation and access control mechanisms that govern the plugin's email rerouting test functionality. The flaw allows malicious actors to exploit a trust relationship that should only be established through legitimate system components, instead permitting arbitrary client-supplied headers to satisfy the required authorization checks.
The technical implementation of this vulnerability resides in how the plugin validates source addresses for its email redirection test mode. Rather than employing robust authentication mechanisms or server-side verification of trusted sources, the plugin relies on HTTP request headers that can be easily manipulated by attackers. This design choice creates a dangerous attack vector where unauthenticated users can craft malicious requests containing spoofed header values that appear to originate from trusted internal systems. The vulnerability specifically affects the password reset email functionality, which is a critical component of WordPress security infrastructure.
From an operational impact perspective, this vulnerability enables complete administrative account takeover through a relatively simple exploitation process. An attacker can redirect password reset emails to their own email address and subsequently reset the administrator password, gaining full control over the affected WordPress installation. This type of attack directly violates the principle of least privilege and compromises the fundamental authentication mechanisms that protect web applications. The vulnerability also has implications for other email communications within the system that may be subject to the same redirection mechanism.
The security implications extend beyond simple account takeover to encompass broader system compromise potential. According to the CWE catalog, this vulnerability maps to CWE-284 Access Control Issues, specifically related to insufficient access control validation mechanisms. The ATT&CK framework categorizes this as a privilege escalation technique through credential access, where attackers leverage weak controls to obtain administrative privileges. Organizations using affected versions of ShopMonitor.io face significant risk exposure, particularly in environments where WordPress serves as a critical business application.
Mitigation strategies should focus on immediate plugin updates to version 1.2.0 or later, which presumably addresses the flawed source validation logic. System administrators should also implement additional monitoring for unusual email patterns and consider network-level controls to restrict outbound email traffic from WordPress installations. The remediation process must include thorough testing to ensure that legitimate email functionality remains intact while eliminating the attack vectors that enabled unauthorized redirection. Organizations should also conduct comprehensive vulnerability assessments of their WordPress plugin ecosystem to identify similar access control weaknesses in other third-party components.