CVE-2026-114701 in Waitlist Plugin
Summary
by MITRE • 10/22/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in xootix Waitlist Woocommerce ( Back in stock notifier ) waitlist-woocommerce allows Stored XSS.This issue affects Waitlist Woocommerce ( Back in stock notifier ): from n/a through 2.9.1.
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Analysis
by VulDB Data Team • 10/22/2026
The identified vulnerability represents a classic instance of improper neutralization of input during web page generation, commonly known as Cross-Site Scripting or XSS. Specifically, this flaw manifests within the Waitlist Woocommerce plugin, also referred to as the Back in stock notifier functionality for WordPress sites running on the WooCommerce e-commerce platform. The affected versions span from no specific lower bound up through version 2.9.1. This vulnerability is categorized under CWE-79, which defines Improper Neutralization of Input During Web Page Generation. In this context, the application fails to adequately sanitize or encode user-supplied data before including it in dynamically generated web pages, allowing malicious scripts to be injected and subsequently executed by unsuspecting users' browsers.
The technical nature of this flaw is classified as a Stored XSS vulnerability. Unlike reflected XSS attacks where malicious payloads are delivered via URLs and execute immediately upon request, stored vulnerabilities involve the persistence of the malicious code within the application's backend storage, such as a database. In the case of the Waitlist Woocommerce plugin, an attacker can likely inject JavaScript code through fields intended for legitimate user input, such as email addresses or notification preferences associated with waiting lists. Once this data is saved to the server and later retrieved by other users viewing the waitlist status or related pages, the embedded script executes in their browser context. This persistence mechanism significantly amplifies the severity of the vulnerability because a single injection point can compromise multiple victims without requiring further interaction from the attacker after the initial payload submission.
The operational impact of this Stored XSS vulnerability is substantial and multifaceted. Primarily, it enables session hijacking, where an attacker captures sensitive authentication cookies or tokens associated with user sessions. By stealing these credentials, the adversary gains unauthorized access to victim accounts, which may include administrative privileges if targeted users possess elevated roles within the WordPress environment. Furthermore, this vulnerability facilitates data exfiltration, allowing attackers to read and transmit confidential information displayed on the page, such as customer details or inventory status. It also permits defacement of the website interface by injecting malicious HTML content that alters the visual presentation for all visitors. In more advanced scenarios, the attacker could deploy keyloggers to capture keystrokes or redirect users to phishing sites designed to steal additional credentials, thereby compromising the integrity and confidentiality of the entire e-commerce ecosystem hosted on the vulnerable WordPress installation.
From a threat intelligence perspective, this vulnerability aligns with MITRE ATT&CK techniques related to Client-Side Injection and Collection via Browser Use. The attack vector typically involves social engineering or direct exploitation through accessible input fields, followed by persistence mechanisms that ensure the payload remains active until remediated. The lack of output encoding means that special characters are interpreted as executable code rather than data, violating fundamental security principles regarding the separation of code and data in web application development. This flaw underscores the critical importance of implementing robust Content Security Policies (CSP) and ensuring that all frameworks or plugins adhere to strict input validation and output encoding standards before rendering content to end-users.
Mitigation strategies must focus on immediate remediation through software updates and enhanced defensive configurations. The primary recommendation is to upgrade the Waitlist Woocommerce plugin to a version later than 2.9.1, where the developers have presumably implemented proper sanitization routines such as using htmlspecialchars or equivalent encoding functions for all user inputs before database storage and retrieval. For organizations unable to update immediately due to compatibility constraints, implementing a Web Application Firewall (WAF) can provide temporary protection by filtering out malicious payloads containing script tags or event handlers in HTTP requests. Additionally, administrators should enforce strict Content Security Policies that restrict the execution of inline scripts, thereby neutralizing the impact even if an injection attempt succeeds. Regular security audits and code reviews focusing on input handling mechanisms are essential to prevent similar vulnerabilities from arising in other components of the WordPress ecosystem.