CVE-2026-108495 in SureForms Plugin
Summary
by MITRE • 10/13/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Brainstorm Force SureForms sureforms allows Stored XSS.This issue affects SureForms: from n/a through 2.12.7.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 10/13/2026
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 as a Stored XSS within the Brainstorm Force SureForms plugin for WordPress. Unlike reflected XSS attacks where malicious scripts are executed immediately via a crafted URL, stored vulnerabilities persist on the target server. In this context, an attacker can inject malicious JavaScript code into form fields that are subsequently saved to the database without adequate sanitization or validation by the application logic. When other users or administrators later view the submitted data through the SureForms interface, the browser interprets and executes the embedded script in their session context. This persistence mechanism significantly amplifies the risk profile because the payload does not require social engineering tricks like phishing links to trigger; it activates automatically upon viewing the affected content.
From a technical perspective, the root cause lies in the failure of the application to properly neutralize special characters or escape user-supplied input before rendering it within HTML responses. The vulnerability affects versions of SureForms ranging from n/a through 2.12.7, indicating that any installation running these older iterations is susceptible to exploitation. By bypassing input validation mechanisms, an attacker can inject scripts that interact with the Document Object Model (DOM) of the victim's browser. This allows for a wide range of malicious activities including session hijacking, where the attacker steals authentication cookies or tokens to impersonate legitimate users; keylogging, which captures sensitive data typed into forms on other sites if cross-domain restrictions are bypassed; and defacement of web pages by altering displayed content. The impact is particularly severe in administrative contexts because administrators often have elevated privileges, meaning a successful attack could lead to full compromise of the WordPress installation and potentially the underlying server infrastructure hosting the application.
This vulnerability aligns directly with CWE-79, which defines Improper Neutralization of Input During Web Page Generation: Cross-site Scripting (XSS). Furthermore, in terms of offensive security frameworks such as MITRE ATT&CK, this behavior maps to techniques involving Client-Side Injection and potentially Account Manipulation if the attacker uses stolen credentials for lateral movement. The persistence aspect classifies it under Stored XSS, which is often prioritized by threat actors due to its ability to affect multiple victims without further interaction from the initial exploit vector. Organizations relying on these versions of SureForms face significant operational risks including data breaches, loss of user trust, and potential regulatory non-compliance depending on the sensitivity of the data processed through the forms.
To mitigate this vulnerability, immediate action is required by upgrading the Brainstorm Force SureForms plugin to a version newer than 2.12.7 where these input validation issues have been addressed by the developers. Until an update can be applied, administrators should implement strict server-side input filtering and output encoding as a compensating control. This involves ensuring that all user inputs are validated against expected formats and that any data rendered in HTML contexts is properly escaped using context-aware encoding techniques such as HTML entity encoding for body content or JavaScript escaping for script blocks. Additionally, implementing Content Security Policy (CSP) headers can help mitigate the impact of successful XSS attacks by restricting the sources from which scripts can be loaded and executed, thereby preventing unauthorized code injection even if input validation fails. Regular security audits and penetration testing should also be conducted to identify similar weaknesses in other form-handling components within the application ecosystem.