CVE-2026-24591 in Turn Yoast SEO FAQ Block to Accordion Plugin
Summary
by MITRE • 01/23/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in yasir129 Turn Yoast SEO FAQ Block to Accordion faq-schema-block-to-accordion allows Stored XSS.This issue affects Turn Yoast SEO FAQ Block to Accordion: from n/a through <= 1.0.6.
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Analysis
by VulDB Data Team • 01/23/2026
This vulnerability represents a critical cross-site scripting flaw that resides within the Turn Yoast SEO FAQ Block to Accordion WordPress plugin, specifically impacting versions through 1.0.6. The issue stems from improper input sanitization during the generation of web pages, creating an avenue for malicious actors to inject persistent script code into the plugin's output. The vulnerability classifies under CWE-79 which specifically addresses cross-site scripting flaws where web applications fail to properly neutralize user input before incorporating it into dynamically generated web pages. This particular weakness allows attackers to execute malicious scripts in the context of other users' browsers, potentially leading to session hijacking, data theft, or unauthorized actions performed on behalf of victims.
The operational impact of this stored XSS vulnerability is particularly severe as it enables attackers to inject malicious code that persists in the plugin's generated content. When users view pages containing the compromised FAQ blocks, the malicious scripts execute automatically in their browsers, creating a persistent threat that affects all visitors to the affected website. The vulnerability occurs during the web page generation process where user-provided FAQ content is not adequately sanitized before being rendered in the browser, allowing attackers to embed script tags, javascript payloads, or other malicious code within the FAQ question or answer fields. This stored nature of the vulnerability means that the malicious code remains embedded in the website's database and continues to execute whenever the affected pages are accessed, making it particularly dangerous for content management systems that rely on user-generated content.
Attackers can exploit this vulnerability through the WordPress admin interface where FAQ content is entered and processed by the plugin. The ATT&CK framework categorizes this as a web application attack vector under the T1190 technique for exploitation of vulnerabilities in web applications. The attack typically involves an authenticated user with sufficient privileges to modify FAQ content, though in some cases, if the plugin allows unauthenticated input or has misconfigured permissions, the attack surface may expand. The vulnerability can be leveraged to perform session hijacking attacks, steal administrator credentials, inject malicious redirects to phishing sites, or deploy additional malware through browser-based attacks. The impact extends beyond simple script execution as it can compromise the entire WordPress installation if administrators are tricked into viewing maliciously crafted FAQ content, potentially leading to complete system compromise and unauthorized access to sensitive data.
The recommended mitigation strategies include immediate patching of the affected plugin to version 1.0.7 or later, which should contain the necessary input sanitization fixes. Administrators should implement strict input validation and output encoding for all user-generated content within the plugin's FAQ management interface. The principle of least privilege should be enforced by limiting administrative access to only those users who require it, while also implementing content security policies to prevent execution of unauthorized scripts. Additionally, regular security audits of installed plugins should be conducted to identify similar vulnerabilities, and web application firewalls can be deployed to detect and block suspicious script injection attempts. Organizations should also maintain regular backups and implement proper monitoring of user activity within the WordPress admin interface to quickly detect any unauthorized modifications to FAQ content that might indicate exploitation attempts.