CVE-2026-103340 in Site Reviews Plugin
Summary
by MITRE • 10/01/2026
Missing Authorization vulnerability in Gemini Labs Site Reviews site-reviews allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Site Reviews: from n/a through 8.3.2.
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Analysis
by VulDB Data Team • 10/01/2026
The identified security flaw represents a critical failure in access control mechanisms within the Site Reviews plugin for WordPress, specifically affecting versions ranging from initial releases up to version 8.3.2. This vulnerability is classified as an Insecure Direct Object Reference or Broken Access Control issue, where the application fails to properly verify whether the authenticated user has sufficient privileges to perform specific actions on review data. The core technical flaw lies in the absence of robust server-side authorization checks when processing requests related to managing reviews. Consequently, any user with a valid account can manipulate parameters within HTTP requests to access, modify, or delete review entries belonging to other users or administrative accounts without proper permission validation. This misconfiguration allows attackers to bypass intended security boundaries by directly interacting with internal implementation objects that should be restricted based on the user's role and permissions.
From an operational perspective, this vulnerability enables unauthorized actors to compromise the integrity of the website’s content management system. An attacker can exploit this flaw to delete legitimate customer reviews, thereby damaging the site owner’s reputation and trust metrics which are often crucial for e-commerce or service-based businesses. Furthermore, the ability to create fake positive reviews allows for review manipulation, potentially violating consumer protection laws and platform policies regarding deceptive practices. In more severe scenarios, if combined with other vulnerabilities such as Cross-Site Scripting, this access control failure could facilitate persistent defacement of the site’s public-facing content or lead to further privilege escalation within the WordPress environment. The impact extends beyond simple data manipulation, affecting the overall availability and trustworthiness of the web application for its end users.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-269, which describes Improper Privilege Assignment, as well as CWE-862, Missing Authorization. In terms of offensive security frameworks, this behavior corresponds to MITRE ATT&CK technique T1078, specifically the Valid Accounts subcategory where attackers leverage legitimate credentials but exploit misconfigured permissions to achieve unauthorized access. The exploitation typically involves intercepting HTTP requests via a proxy tool and modifying parameters such as review IDs or action types to target resources outside the attacker’s authorized scope. Since the vulnerability stems from server-side logic rather than client-side validation, standard browser security policies do not mitigate this risk, making it easily exploitable by automated scripts targeting vulnerable instances across the internet.
To remediate this issue, site administrators must immediately update the Site Reviews plugin to version 8.3.3 or later, where these access control checks have been properly implemented and validated. It is imperative that developers enforce strict authorization logic on all endpoints handling review data, ensuring that every request verifies both user authentication and role-based permissions before executing any state-changing operations. Additionally, implementing principle of least privilege in the application design can prevent such flaws by defaulting to deny access unless explicitly granted. Regular security audits and penetration testing should be conducted to identify similar misconfigurations in other plugins or custom code within the WordPress ecosystem, ensuring a comprehensive defense against broken access control vulnerabilities that remain one of the most prevalent threats in web applications today.