CVE-2026-115961 in B Slider Plugin
Summary
by MITRE • 10/26/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins B Slider b-slider allows Stored XSS.This issue affects B Slider: from n/a through 2.2.2.
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Analysis
by VulDB Data Team • 10/26/2026
The identified security flaw represents a classic instance of Improper Neutralization of Input During Web Page Generation, commonly known as Cross-Site Scripting or XSS. Specifically, this vulnerability manifests within the bPlugins B Slider component for WordPress environments, affecting versions ranging from n/a through 2.2.2. The core technical deficiency lies in the application's failure to adequately sanitize or encode user-supplied input before it is rendered back into the web page output. This lack of proper validation allows an attacker to inject malicious client-side scripts that are subsequently stored on the target server, classifying this as a Stored XSS vulnerability rather than a reflected one.
In a typical exploitation scenario for this specific component, an adversary would likely interact with administrative interfaces or public-facing sliders where input fields accept arbitrary text content. Because the B Slider plugin does not sufficiently filter special characters such as angle brackets, quotation marks, and script delimiters, these inputs are preserved in their raw form within the database. When a victim user subsequently loads a webpage containing the compromised slider, the browser parses the stored malicious payload as executable code rather than plain text. This execution occurs within the context of the vulnerable website's domain, granting the injected script full access to the page's Document Object Model and associated cookies or session tokens.
The operational impact of this vulnerability is severe due to its persistent nature. Unlike reflected XSS attacks that require social engineering to trick a user into clicking a malicious link, stored XSS remains active on the server until the compromised content is manually removed by an administrator. This persistence significantly increases the attack surface and likelihood of successful exploitation. Attackers can leverage this capability to hijack administrative sessions, deface websites, redirect users to phishing sites, or deploy further malware payloads such as keyloggers that capture sensitive credentials entered into forms on the affected site. The trust relationship between the user's browser and the web application is fundamentally broken, allowing for unauthorized actions performed under the guise of a legitimate administrator or end-user.
From an industry standards perspective, this vulnerability aligns directly with CWE-79: Improper Neutralization of Input During Web Page Generation Cross-site Scripting in the Common Weakness Enumeration database. It also maps to specific tactics within the MITRE ATT&CK framework, particularly T1059 Command and Scripting Interpreter for executing arbitrary code via JavaScript, and potentially T1204 User Execution if the attack relies on inducing a user interaction to trigger initial payload delivery or persistence mechanisms. The failure to implement output encoding constitutes a fundamental deviation from secure coding practices recommended by OWASP in their Top Ten Web Application Security Risks list.
Mitigation strategies must focus on both immediate remediation and long-term defensive posture improvements. The most effective solution is for administrators of affected sites to upgrade the B Slider plugin to version 2.2.3 or later, where the developers have presumably implemented proper input sanitization and output encoding mechanisms such as HTML entity encoding for all user-controlled data before rendering it in the DOM. For organizations unable to immediately patch due to compatibility constraints, implementing a Web Application Firewall with rulesets tuned to detect and block common XSS payloads can provide an additional layer of defense. Furthermore, enforcing Content Security Policy headers that restrict script execution sources can mitigate the impact by preventing unauthorized scripts from running even if they are injected into the page structure. Regular security audits and code reviews focusing on input validation logic are essential to prevent similar vulnerabilities in future development cycles.