CVE-2026-39750 in StoreGrowth Smart Sales Booster Plugin
Summary
by MITRE • 10/06/2026
Unauthenticated Cross Site Scripting (XSS) in StoreGrowth: Smart Sales Booster for WooCommerce | BOGO, Upsells, Direct Checkout, Quick View, Side Cart <= 2.0.6 versions.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified as an unauthenticated cross-site scripting flaw within StoreGrowth prior to version 2.0.7 represents a critical security deficiency in the application's input validation and output encoding mechanisms. This specific implementation of Cross-Site Scripting allows remote attackers who do not possess valid credentials or authentication tokens to inject malicious client-side scripts into web pages viewed by other users. The root cause typically lies in the failure to properly sanitize user-supplied data before it is rendered within the HTML context, particularly in areas where dynamic content such as product details, cart items, or promotional banners are displayed without adequate escaping of special characters like angle brackets and quotes. This lack of sanitization enables the execution of arbitrary JavaScript code in the victim's browser under the security context of the vulnerable web application domain.
From a technical perspective, this vulnerability aligns with CWE-79, which classifies improper neutralization of input during web page generation as Cross-site Scripting. The attack vector is unauthenticated, meaning that an adversary can exploit this flaw without needing to bypass any login mechanisms or session validation processes. This significantly lowers the barrier for entry, allowing a wide range of actors, including opportunistic attackers scanning public-facing sites, to initiate attacks. The malicious script payload could be embedded in various input fields such as search queries, comment sections, or URL parameters that are reflected back into the page response without proper encoding. When another user interacts with these inputs, their browser executes the injected code, leading to a breach of confidentiality and integrity for the end-user session.
The operational impact of this vulnerability is severe due to its potential to facilitate various malicious activities against site visitors. Attackers can use the executed script to steal sensitive information such as session cookies, which may allow them to hijack user sessions and impersonate legitimate users if cookie flags like HttpOnly are not strictly enforced or if other authentication tokens are stored in local storage. Furthermore, this vulnerability can be leveraged for phishing attacks by redirecting users to malicious sites that mimic the original store's interface to harvest credentials. It also enables defacement of the website content, manipulation of user interactions through DOM modification, and potentially serves as a vector for distributing malware via drive-by downloads if combined with other browser vulnerabilities or social engineering tactics.
In terms of industry frameworks, this vulnerability maps directly to MITRE ATT&CK technique T1059.007, which refers to JavaScript execution within the context of web browsers. The unauthenticated nature of the exploit places it in the initial access phase of an attack lifecycle if used for credential theft or as a precursor to further lateral movement within a compromised environment where session tokens are shared across services. Organizations relying on this plugin must recognize that even without administrative privileges, regular customers can become vectors for attacks against other users, thereby damaging the reputation and trust associated with the e-commerce platform.
To mitigate this risk, immediate action is required by upgrading StoreGrowth to version 2.0.7 or later, where these input validation issues have been addressed through improved sanitization routines and strict output encoding practices. Developers should implement Content Security Policy headers to restrict the sources from which scripts can be loaded, thereby reducing the impact of any successful XSS injection even if it occurs. Additionally, adopting a defense-in-depth strategy that includes regular security audits, static code analysis focused on input handling, and dynamic testing during the development lifecycle is essential for preventing similar vulnerabilities in future releases. Ensuring that all user inputs are treated as untrusted data until explicitly validated against expected formats remains the fundamental principle for securing web applications against injection-based attacks.