CVE-2026-82125 in Schema & Structured Data for WP & AMP Plugin
Summary
by MITRE • 09/16/2026
The Schema & Structured Data for WP & AMP WordPress plugin before 1.66 does not correctly verify the ownership or the moderation status of a comment before returning its content, allowing unauthenticated users to read the content of comments still awaiting moderation or marked as spam.
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Analysis
by VulDB Data Team • 09/16/2026
The vulnerability identified in Schema and Structured Data for WP & AMP versions prior to 1.66 represents a significant information disclosure flaw rooted in insufficient access control mechanisms within the plugin's comment handling logic. This issue specifically affects how the application processes requests related to WordPress comments, particularly those that are not yet publicly visible due to pending moderation status or spam classification. In standard WordPress architecture, comments marked as awaiting moderation or identified as spam are typically hidden from public view and should only be accessible by users with appropriate administrative privileges or specific capabilities. However, this plugin fails to enforce these restrictions when serving structured data via its API endpoints, thereby exposing sensitive user-generated content that was intended to remain private during the review process.
From a technical perspective, the flaw lies in the verification logic used before returning comment data through the schema and structured data output functions. The application does not adequately check the moderation_status or spam status of a specific comment ID when processing requests for structured data generation. This oversight allows unauthenticated attackers to query these endpoints directly using standard HTTP methods such as GET, retrieving full text content, author details, and timestamps associated with comments that have not yet been approved by site administrators. The absence of proper authorization checks means that any individual on the internet can enumerate and extract this information without needing valid credentials or session tokens, bypassing the intended privacy controls established by WordPress core functionality.
The operational impact of this vulnerability is primarily centered around data leakage and potential social engineering risks. While comments awaiting moderation are often considered less sensitive than published content, they may contain personally identifiable information such as email addresses, website URLs, or full names provided during the submission process. Furthermore, if users include confidential details in their initial submissions before approval, this exposure could lead to privacy violations under regulations like GDPR or CCPA depending on jurisdiction and data type. Attackers can leverage this information for phishing campaigns by crafting targeted messages based on real user interactions with the site, thereby increasing the success rate of social engineering attacks against both individual users and organizational entities associated with the website owners.
This vulnerability aligns closely with CWE-200: Information Exposure, as it involves the unintentional disclosure of data to unauthorized actors due to improper access control checks. Additionally, from a tactical standpoint within the MITRE ATT&CK framework, this behavior corresponds to techniques related to Discovery and Collection, specifically allowing adversaries to gather information about site users through automated scraping or manual enumeration. The lack of authentication requirement places it in the category of unauthenticated attacks, which are particularly dangerous because they require no initial foothold on the system, making them scalable and easy to execute at a large scale across multiple vulnerable installations worldwide.
To mitigate this risk, administrators must immediately update the Schema & Structured Data for WP & AMP plugin to version 1.66 or later, where the developers have addressed these access control deficiencies by implementing stricter validation of comment status before rendering structured data. Until an upgrade is performed, site owners should consider disabling any exposed endpoints related to this functionality if possible through server-side configuration rules such as Nginx deny directives or Apache mod_rewrite conditions that block direct API calls for unauthenticated users. Regular security audits and penetration testing focused on input validation and authorization checks are recommended to identify similar flaws in other plugins or custom code, ensuring a more robust defense-in-depth strategy against information disclosure vulnerabilities.