CVE-2026-12421 in ARforms Plugin
Summary
by MITRE • 07/23/2026
The ARforms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'password' Field Values in all versions up to, and including, 7.2.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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Analysis
by VulDB Data Team • 07/23/2026
The ARforms plugin for WordPress presents a critical stored cross-site scripting vulnerability that affects all versions up to and including 7.2.1, creating a significant security risk for WordPress installations. This vulnerability stems from inadequate input sanitization and output escaping mechanisms within the plugin's handling of password field values, allowing malicious actors to inject persistent web scripts into the application's data storage. The flaw exists in the plugin's form processing logic where user-provided password data is not properly validated or escaped before being stored in the database and subsequently rendered on web pages without adequate security measures.
The technical exploitation of this vulnerability occurs through the manipulation of the 'password' field values within ARforms forms, where attackers can craft malicious script payloads that persist in the plugin's database storage. When legitimate users access pages containing these injected scripts, the malicious code executes in their browser context, potentially leading to session hijacking, credential theft, or redirection to malicious websites. This stored XSS vulnerability operates at the application layer and leverages the trust relationship between the WordPress platform and its plugins, making it particularly dangerous as it can affect any user who views pages containing the injected content.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform sophisticated attacks such as cookie theft through session manipulation, redirect users to phishing sites, or even execute more complex malicious payloads that could compromise entire WordPress installations. The unauthenticated nature of the attack means that any user with access to the affected WordPress site can potentially exploit this vulnerability without requiring valid credentials, making it especially concerning for public-facing websites where form submissions are common. This vulnerability directly maps to CWE-79 which describes improper neutralization of input during web page generation in a web application, and aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments or links.
Organizations using ARforms plugin versions 7.2.1 and earlier must implement immediate mitigations including updating to the latest available version that addresses this vulnerability, implementing additional input validation measures at the web application firewall level, and conducting comprehensive security audits of all form inputs across the WordPress platform. The recommended remediation strategy involves not only upgrading the vulnerable plugin but also establishing proper output escaping mechanisms for all user-provided content, implementing Content Security Policy headers to limit script execution, and monitoring for suspicious form submissions that may indicate exploitation attempts. Additionally, administrators should consider implementing rate limiting on form submissions and conducting regular security assessments of third-party plugins to prevent similar vulnerabilities from being introduced into the WordPress ecosystem through potentially compromised or outdated software components.