CVE-2026-3027 is a cross-site scripting (XSS) vulnerability identified in the erzhongxmu JEEWMS product, affecting all versions up to 3.7. The vulnerability exists in the UEditor component, specifically within the file src/main/webapp/plug-in/ueditor/jsp/getContent.jsp. The issue stems from insufficient input validation or sanitization of the 'myEditor' parameter, which an attacker can manipulate to inject malicious JavaScript code. This vulnerability is remotely exploitable without requiring authentication, though it requires user interaction, such as a victim clicking a malicious link or visiting a crafted page. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity, with the vector highlighting network attack vector, low attack complexity, no privileges or user interaction required for the attacker, but user interaction is needed for the victim. The vendor was notified early but has not responded or provided a patch, and while an exploit is publicly available, no confirmed active exploitation in the wild has been reported. This XSS flaw could allow attackers to execute arbitrary scripts in the context of the victim's browser, potentially leading to session hijacking, defacement, or redirection to malicious sites. The vulnerability affects a widely used web content management system component, making it a relevant concern for organizations relying on JEEWMS for web content editing and management.

The primary impact of this vulnerability is the execution of arbitrary JavaScript in the context of the affected web application, which can compromise user confidentiality by stealing session tokens or sensitive information. Integrity may be affected if attackers manipulate displayed content or perform unauthorized actions on behalf of users. Availability impact is minimal as this is not a denial-of-service vulnerability. Since exploitation requires user interaction, the attack surface is somewhat limited but still significant, especially in environments with many users or public-facing portals. Organizations using JEEWMS risk reputational damage, data leakage, and potential unauthorized access if attackers leverage this vulnerability effectively. The lack of vendor response and patch availability increases the window of exposure, potentially inviting targeted attacks or automated exploit attempts. This is particularly critical for sectors handling sensitive data or with high regulatory compliance requirements.

Given the absence of an official patch, organizations should implement immediate compensating controls. These include applying strict input validation and output encoding on the 'myEditor' parameter and other user inputs within the UEditor component to prevent script injection. Web application firewalls (WAFs) can be configured to detect and block typical XSS payloads targeting this parameter. Administrators should consider disabling or isolating the UEditor plugin if feasible until a secure update is available. Educating users about phishing and suspicious links can reduce the risk of successful exploitation. Regular monitoring of web logs for suspicious requests targeting getContent.jsp or the 'myEditor' parameter can help detect attempted exploitation. Organizations should also engage with the vendor or community for updates and consider migrating to alternative solutions if the vendor remains unresponsive. Finally, applying Content Security Policy (CSP) headers can mitigate the impact of injected scripts by restricting script execution contexts.