CVE-2026-107790 in HireZoot Plugin
Summary
by MITRE • 10/22/2026
The HireZoot WordPress plugin before 4.1.1 does not sanitise and escape some of its stored data before outputting it in the admin dashboard, and additionally reverses the HTML-entity encoding that would otherwise neutralise it, allowing users with the Author role to perform Stored Cross-Site Scripting attacks that execute in the context of a logged-in administrator.
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Analysis
by VulDB Data Team • 10/22/2026
The vulnerability identified in HireZoot WordPress plugin versions prior to 4.1.1 represents a critical security flaw rooted in improper input validation and output encoding practices within the application's administrative interface. As a widely used tool for managing hiring processes, the plugin handles sensitive user data that is subsequently rendered back into the browser environment. The core technical deficiency lies in the failure of the software to properly sanitize or escape specific stored data fields before they are displayed on the admin dashboard pages. This oversight creates an avenue for Stored Cross-Site Scripting attacks, a category of vulnerability classified under CWE-79 in the Common Weakness Enumeration standard. Unlike reflected XSS where malicious scripts are executed via a crafted link, this flaw allows attackers to persistently inject executable code into the application's database through legitimate user inputs that are then served to other users without modification or neutralization.
The operational impact of this vulnerability is significantly amplified by the specific behavior of the plugin regarding HTML entity encoding. In standard web security practices, input data containing special characters such as less-than and greater-than signs should be encoded into their corresponding HTML entities, effectively rendering them inert text rather than executable code. However, HireZoot not only fails to escape this data initially but also actively reverses any existing HTML-entity encoding during the output process. This reversal mechanism ensures that even if some level of protection was previously applied or attempted by other system layers, it is stripped away before the content reaches the client-side browser. Consequently, when a user with the Author role submits malicious script payloads disguised as legitimate data entries, these scripts are stored in the database and subsequently decoded back into executable JavaScript code upon retrieval for display on the admin dashboard.
The severity of this issue is further heightened by the privilege level required to exploit it versus the impact achieved. While exploitation requires an attacker to possess at least the Author role within the WordPress environment, the resulting execution context grants them administrative privileges. This means that once a malicious script executes in the browser session of a logged-in administrator, it operates with full control over the website's backend functions. An adversary can leverage this access to deface the site, steal sensitive administrative credentials via cookie or local storage theft, perform actions on behalf of the admin such as creating new user accounts or modifying settings, and potentially pivot to further attacks against the underlying server infrastructure if additional vulnerabilities exist in other plugins or themes. This scenario aligns with ATT&CK technique T1059.007, which covers JavaScript execution within a browser environment for lateral movement or persistence.
To mitigate this vulnerability, immediate action is required by system administrators and developers maintaining instances of the HireZoot plugin. The primary remediation step involves upgrading to version 4.1.1 or later, where these sanitization and escaping mechanisms have been corrected to ensure that all user-supplied data is properly validated against a whitelist of allowed characters and encoded appropriately before being rendered in HTML contexts. For organizations unable to upgrade immediately due to compatibility constraints, temporary mitigations should include restricting the Author role's ability to submit content that will be displayed on admin pages if possible, or implementing Web Application Firewall rules designed to detect and block common XSS payloads such as script tags and event handlers within POST requests targeting plugin endpoints. Additionally, enforcing strict Content Security Policy headers can help mitigate the impact of any successful injection by restricting the sources from which scripts are allowed to execute, thereby reducing the effectiveness of the malicious code even if it is successfully injected into the page DOM.