Compliance Impact

The vulnerability allows authenticated users with Subscriber-level access to inject arbitrary scripts via stored cross-site scripting (XSS). This can lead to unauthorized access or manipulation of user data, potentially compromising confidentiality and integrity. Such security weaknesses can result in non-compliance with standards like GDPR and HIPAA, which require protection of personal and sensitive data against unauthorized access and attacks. Therefore, the vulnerability poses a risk to compliance with these regulations due to insufficient input sanitization and output escaping. [4]

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in the Stylish Order Form Builder plugin for WordPress. It occurs via the 'product_name' parameter in all versions up to and including 1.0. Due to insufficient input sanitization and output escaping, authenticated attackers with Subscriber-level access or higher can inject arbitrary web scripts into pages. These scripts execute whenever a user accesses the injected page.

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Impact Analysis

An attacker exploiting this vulnerability can inject malicious scripts that execute in the context of other users visiting the affected pages. This can lead to theft of user credentials, session hijacking, defacement, or other malicious actions performed on behalf of the victim user. Since the attacker needs only Subscriber-level access, it lowers the barrier for exploitation within the WordPress environment.

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Detection Guidance

This vulnerability can be detected by inspecting the 'product_name' parameter in the Stylish Order Form Builder plugin for WordPress, especially in versions up to 1.0. Since the vulnerability involves Stored Cross-Site Scripting (XSS) via insufficient input sanitization and output escaping, you can look for suspicious or unexpected script tags or JavaScript code injected into product names. To detect it on your system, you can review the database entries for product names for any injected scripts. Additionally, monitoring HTTP requests and responses for injected scripts in pages generated by the plugin can help. Specific commands could include using SQL queries to search for script tags in the product_name field, for example: `SELECT * FROM wp_sofb_products WHERE product_name LIKE '%<script>%'` (adjust table name as appropriate). You can also use tools like curl or wget to fetch pages that display products and grep for suspicious script tags. For example: `curl -s http://yourwordpresssite.com/page-containing-products | grep '<script>'`. [1, 3, 4]

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Mitigation Strategies

Immediate mitigation steps include: 1. Restricting or reviewing user permissions to limit who can add or modify products, especially limiting Subscriber-level users from adding or editing product names. 2. Applying input validation and sanitization on the 'product_name' parameter to prevent injection of malicious scripts. 3. Updating the plugin to a patched version if available. 4. If no patch is available, temporarily disabling the plugin or removing the ability for users to add or edit products until a fix is applied. 5. Reviewing and cleaning existing product names in the database to remove any injected scripts. 6. Implementing Web Application Firewall (WAF) rules to block malicious payloads targeting this vulnerability. [4]

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