CVE-2025-8686 in WP Easy FAQs Plugin
Summary
by MITRE • 09/11/2025
The WP Easy FAQs plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's WP_EASY_FAQ shortcode in all versions up to, and including, 1.0.5 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with author-level access and above, 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 • 09/11/2025
The WP Easy FAQs plugin for WordPress represents a significant security vulnerability through its stored cross-site scripting flaw identified as CVE-2025-8686. This vulnerability affects all versions up to and including 1.0.5, creating a persistent threat vector that can be exploited by authenticated attackers who possess author-level privileges or higher. The flaw resides specifically within the plugin's WP_EASY_FAQ shortcode implementation, where insufficient input sanitization and output escaping mechanisms fail to properly validate or sanitize user-supplied attributes before processing them. The vulnerability operates as a stored XSS attack because malicious scripts injected through the shortcode attributes are permanently stored within the plugin's data handling mechanisms, making them persistent across multiple user sessions and page accesses. This characteristic distinguishes it from reflected XSS attacks, as the malicious code remains embedded in the system and executes automatically whenever affected pages are accessed by any user with appropriate permissions.
The technical implementation of this vulnerability stems from inadequate security controls within the plugin's shortcode processing logic. When administrators or authors create FAQ entries using the WP_EASY_FAQ shortcode, they can include malicious attributes that are not properly sanitized before being stored in the WordPress database. The plugin fails to implement proper output escaping mechanisms when rendering these stored attributes, allowing malicious JavaScript code to be injected directly into the HTML output. This flaw directly corresponds to CWE-79, which defines Cross-Site Scripting as a vulnerability where untrusted data is incorporated into web pages without proper validation or escaping. The vulnerability's impact is amplified by the fact that attackers only need author-level access, which is relatively common in WordPress environments where multiple users manage content. This low privilege requirement makes the vulnerability particularly dangerous as it can be exploited by users who are not necessarily malicious actors but may have been compromised or who have access to legitimate administrative accounts.
The operational impact of CVE-2025-8686 extends beyond simple script execution, as the stored nature of the vulnerability allows for persistent malicious activities that can compromise entire WordPress installations. Once an attacker successfully injects malicious scripts through the shortcode, these scripts execute whenever any user accesses pages containing the compromised FAQ entries, potentially leading to session hijacking, credential theft, or further exploitation of the WordPress environment. The vulnerability creates a persistent backdoor that can be used to maintain access to the system, as the malicious code remains stored and executes automatically. Attackers can leverage this vulnerability to redirect users to malicious domains, steal cookies and session information, or even inject additional malicious content into the WordPress administration interface. The impact is particularly severe in multi-user environments where authors and contributors may not be properly monitored or restricted, as the vulnerability can be exploited through legitimate content creation workflows. This type of vulnerability also aligns with ATT&CK technique T1566, which involves the use of malicious content to gain initial access or maintain persistence within target systems.
Mitigation strategies for CVE-2025-8686 should focus on immediate remediation through plugin updates to versions that address the sanitization and escaping vulnerabilities. Organizations should implement strict input validation and output escaping mechanisms for all user-supplied content, particularly within shortcode implementations. The recommended approach includes implementing comprehensive sanitization of all shortcode attributes before storage and applying proper HTML escaping when rendering stored content. Additionally, administrators should consider implementing role-based access controls to limit the ability of non-privileged users to create or modify content that could be exploited through shortcodes. Regular security auditing of WordPress plugins and themes should be conducted to identify similar vulnerabilities that may exist in other components of the WordPress ecosystem. The vulnerability highlights the importance of implementing defense-in-depth strategies, including web application firewalls, content security policies, and regular penetration testing to identify and remediate similar security flaws. Organizations should also establish monitoring procedures to detect anomalous behavior in their WordPress installations that could indicate exploitation of stored XSS vulnerabilities, as the persistent nature of the attack makes detection more challenging than transient vulnerabilities.