CVE-2025-48356 in Kanpress Plugin
Summary
by MITRE • 08/28/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Isra Kanpress allows Stored XSS. This issue affects Kanpress: from n/a through 1.1.
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Analysis
by VulDB Data Team • 06/01/2026
Cross-site scripting vulnerabilities represent one of the most prevalent and dangerous web application security flaws, with the potential to compromise user sessions and execute malicious code within victim browsers. The identified vulnerability in Isra Kanpress constitutes a stored cross-site scripting flaw that occurs during web page generation when input data is improperly neutralized. This specific weakness allows attackers to inject malicious scripts that persist in the application's database and execute whenever affected pages are rendered to users. The vulnerability exists within the input processing pipeline where user-supplied content intended for display on web pages fails to undergo adequate sanitization or encoding before being stored and subsequently served back to other users. The affected version range indicates that all iterations from the initial release through version 1.1 remain susceptible to this exploitation, suggesting a persistent flaw in the application's data handling mechanisms that has not been adequately addressed in the development lifecycle.
The technical exploitation of this stored XSS vulnerability follows a well-established attack pattern where malicious input is first submitted through application forms or content management interfaces and then stored in the backend database. When other users access pages containing this stored malicious content, their browsers execute the injected scripts within their security context, potentially enabling session hijacking, credential theft, or redirection to malicious sites. The flaw directly maps to CWE-79 which defines the improper neutralization of input during web page generation as a critical weakness in web application security. This vulnerability can be leveraged by attackers to perform session fixation attacks, steal authentication cookies, or inject additional malicious payloads that can persist across multiple user interactions with the application. The stored nature of this XSS means that the malicious script remains active even after the initial injection, making it particularly dangerous as it can affect multiple users over extended periods without requiring repeated exploitation attempts.
The operational impact of this vulnerability extends beyond simple data theft to encompass complete compromise of user trust and application integrity. An attacker who successfully exploits this flaw can manipulate content displayed to users, potentially injecting false information, redirecting traffic to phishing sites, or executing commands that bypass normal application security controls. This weakness particularly affects content management systems where user-generated content is frequently displayed without proper sanitization, creating an attack surface that can be exploited to gain unauthorized access to user accounts and sensitive data. The vulnerability's presence in multiple versions of the application indicates a fundamental flaw in the development security practices, suggesting that input validation and output encoding mechanisms are either absent or insufficiently implemented throughout the application's codebase. Organizations relying on affected versions of Kanpress face significant risk of unauthorized data access, potential regulatory compliance violations, and reputational damage from successful exploitation attempts.
Mitigation strategies for this stored XSS vulnerability require immediate implementation of comprehensive input sanitization and output encoding mechanisms throughout the application's data flow. The primary defense involves implementing strict input validation that removes or encodes potentially dangerous characters before storing user content, combined with proper output encoding when rendering data back to users. Organizations should implement Content Security Policy headers to limit script execution and prevent unauthorized code injection, while also ensuring that all user-supplied content undergoes rigorous sanitization before being stored in the database. The remediation process should include comprehensive code reviews to identify all input points where user data enters the application, along with systematic implementation of proper encoding techniques such as HTML entity encoding for web content. Additionally, security testing should include automated scanning for XSS vulnerabilities as well as manual penetration testing to verify that all input handling paths properly neutralize malicious content. This vulnerability serves as a critical reminder of the importance of implementing security controls throughout the software development lifecycle, including the application of secure coding practices that align with industry standards such as those defined in the OWASP Top Ten and NIST cybersecurity guidelines. Organizations must also consider implementing web application firewalls and intrusion detection systems to monitor for potential exploitation attempts and provide additional layers of protection against known XSS attack patterns.