Impact Analysis

This vulnerability can lead to a full account takeover of administrator accounts in HAX CMS. An attacker with low privileges can trick an administrator into executing malicious scripts, which then steal the administrator's access token. With this token, the attacker gains complete administrative access, compromising confidentiality, integrity, and availability of the system. [1]

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Executive Summary

CVE-2026-22704 is a stored Cross-Site Scripting (XSS) vulnerability in HAX CMS versions 11.0.6 to before 25.0.0. An attacker can upload a malicious HTML file containing JavaScript to the application. When an administrator visits this file, the script executes and steals the administrator's JWT access token by exploiting the refresh token mechanism. This allows the attacker to take over the administrator's account and gain full control over the application. The vulnerability is due to improper neutralization of user input, allowing malicious scripts to be stored and executed in other users' contexts. [1]

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Detection Guidance

This vulnerability can be detected by checking for the presence of malicious HTML files uploaded to the application, specifically files like 'pwn1116.html' containing JavaScript payloads. A proof-of-concept involves sending a POST request to the '/system/api/saveFile' endpoint with a multipart/form-data payload to upload such a file. To detect exploitation attempts, monitor for POST requests to '/system/api/saveFile' and look for unusual file uploads containing scripts. Additionally, inspect network traffic for fetch requests to '/system/api/refreshAccessToken' that include the 'haxcms_refresh_token' cookie. Example commands to detect suspicious files or requests could include: 1) Using curl or similar tools to check for uploaded files: `curl -X POST -F '[email protected]' https://your-haxcms-instance/system/api/saveFile` (to test upload). 2) Using web server logs or intrusion detection systems to search for POST requests to '/system/api/saveFile' or fetch requests to '/system/api/refreshAccessToken'. 3) Using grep or similar tools to scan uploaded files for suspicious JavaScript payloads. However, no specific detection commands are provided in the resources. [1]

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Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade HAX CMS to version 25.0.0 or later, where the vulnerability has been patched. This update fixes the stored XSS issue that leads to account takeover. Until the upgrade is applied, restrict file uploads and monitor for suspicious activity related to the '/system/api/saveFile' and '/system/api/refreshAccessToken' endpoints to reduce risk. [1, 2]

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Compliance Impact

The vulnerability allows attackers to perform account takeover by stealing administrator JWT tokens through stored XSS, leading to unauthorized access and control over sensitive data. This could result in violations of data protection regulations such as GDPR and HIPAA, which require safeguarding personal and sensitive information against unauthorized access. Therefore, the vulnerability poses a significant risk to compliance with these standards by compromising confidentiality, integrity, and availability of data. [1]

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