CVE-2025-69362 in UiChemy Plugin
Summary
by MITRE • 01/06/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in POSIMYTH UiChemy uichemy allows Stored XSS.This issue affects UiChemy: from n/a through <= 4.4.2.
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Analysis
by VulDB Data Team • 01/06/2026
The vulnerability identified as CVE-2025-69362 represents a critical cross-site scripting flaw within the POSIMYTH UiChemy uichemy application, specifically classified as a stored XSS vulnerability according to the CWE-79 framework. This weakness occurs when the application fails to properly sanitize user input during web page generation processes, allowing malicious scripts to be permanently stored and subsequently executed in the context of other users' browsers. The vulnerability exists in all versions of UiChemy up to and including version 4.4.2, indicating a widespread exposure across the affected product line. The improper neutralization of input data creates an environment where attackers can inject malicious code that persists within the application's database or storage mechanisms, making it particularly dangerous as the payload executes automatically whenever affected users access the compromised content.
The technical exploitation of this vulnerability follows the standard stored XSS attack pattern where malicious input is first submitted to the application and then retrieved and rendered without proper sanitization. Attackers can leverage this flaw by injecting malicious JavaScript code through input fields that are subsequently stored in the application's database or user-generated content areas. When other users view the compromised content, their browsers execute the injected scripts, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability's classification under CWE-79 indicates that it involves the improper handling of untrusted data within web applications, specifically failing to neutralize or escape potentially dangerous characters and sequences that could be interpreted as executable code by web browsers. This weakness directly violates the principle of input validation and output encoding, which are fundamental security practices for preventing XSS attacks.
The operational impact of this vulnerability extends beyond simple script execution, potentially compromising the entire application ecosystem and user data integrity. Attackers could exploit this flaw to steal session cookies, modify user permissions, access sensitive information, or even perform actions on behalf of authenticated users through the application's interface. The stored nature of the vulnerability means that the malicious code remains persistent, continuously affecting all users who encounter the compromised content without requiring repeated exploitation attempts. This characteristic significantly increases the attack surface and makes the vulnerability particularly dangerous for applications handling sensitive data or user-generated content. The risk is compounded by the fact that the vulnerability affects the entire product version range, suggesting that organizations using UiChemy versions up to 4.4.2 are all potentially exposed to this threat without distinction.
Mitigation strategies for CVE-2025-69362 should prioritize immediate remediation through the application of the vendor's security patches or updates. Organizations should implement comprehensive input validation and output encoding mechanisms to prevent the storage and execution of malicious scripts. The implementation of Content Security Policy headers, proper HTML escaping of user-generated content, and regular security testing including automated vulnerability scanning should be enforced. Additionally, the principle of least privilege should be applied to limit the impact of potential exploitation, ensuring that users have only the necessary permissions to perform their required functions. Organizations should also consider implementing web application firewalls to detect and block suspicious input patterns, and conduct regular security awareness training for developers to prevent similar vulnerabilities in future application development cycles. The ATT&CK framework's T1059.007 technique for command and script injection highlights the importance of preventing such vulnerabilities in web applications, as they provide attackers with persistent execution capabilities that align with the broader tactics of maintaining access and escalating privileges within compromised environments.