CVE-2025-24545 in BSK Forms Validation Plugin
Summary
by MITRE • 02/03/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in BannerSky.com BSK Forms Validation allows Reflected XSS. This issue affects BSK Forms Validation: from n/a through 1.7.
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Analysis
by VulDB Data Team • 02/06/2025
The vulnerability identified as CVE-2025-24545 represents a critical cross-site scripting weakness within the BSK Forms Validation plugin developed by BannerSky.com. This reflected XSS vulnerability occurs during the web page generation process when input data is not properly sanitized before being rendered back to users. The flaw exists in versions ranging from the initial release through version 1.7, indicating a prolonged period during which the security issue remained unaddressed. The vulnerability specifically manifests when user input containing malicious script code is processed and subsequently reflected back in the web application's response without adequate neutralization measures.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding mechanisms within the plugin's form processing functionality. When users submit data through forms that utilize BSK Forms Validation, the system fails to properly escape or sanitize special characters that could be interpreted as executable script code by web browsers. This improper neutralization creates an environment where attackers can inject malicious JavaScript payloads that execute in the context of other users' browsers who view the affected web pages. The reflected nature of this XSS means that the malicious script must be passed through the web application to reach the victim's browser, typically via URL parameters or form submissions that are then echoed back in the response.
The operational impact of this vulnerability extends beyond simple data theft or defacement scenarios. Attackers can leverage this reflected XSS to hijack user sessions, steal sensitive cookies, perform unauthorized actions on behalf of victims, or redirect users to malicious websites. Given that the vulnerability affects a form validation plugin, it could potentially compromise the integrity of data collection processes and expose users to various attack vectors including credential theft, session fixation, and privilege escalation attempts. The reflected nature of the attack means that exploitation typically requires social engineering to convince victims to click on malicious links, but once executed, the attack can persist across multiple user sessions and potentially compromise the entire web application ecosystem.
Mitigation strategies for this vulnerability should prioritize immediate patching of the BSK Forms Validation plugin to the latest secure version that addresses the XSS flaw. Organizations should implement comprehensive input validation and output encoding mechanisms to prevent malicious data from being processed or displayed in web pages. The implementation of Content Security Policy headers can provide additional protection against script execution, while regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other web application components. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and represents a typical example of how insufficient input sanitization can lead to severe security implications. From an ATT&CK framework perspective, this vulnerability maps to techniques involving code injection and credential access, potentially enabling adversaries to establish persistent access to affected systems through user interaction with maliciously crafted payloads.