CVE-2025-7803 in wx-discuz
Summary
by MITRE • 07/18/2025
A vulnerability was found in descreekert wx-discuz up to 12bd4745c63ec203cb32119bf77ead4a923bf277. It has been classified as problematic. This affects the function validToken of the file /wx.php. The manipulation of the argument echostr leads to cross site scripting. It is possible to initiate the attack remotely. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available.
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Analysis
by VulDB Data Team • 07/23/2025
The vulnerability identified as CVE-2025-7803 represents a cross-site scripting flaw in the descreekert wx-discuz application, specifically within the validToken function located in the /wx.php file. This issue has been categorized as problematic and demonstrates a significant security weakness that allows attackers to execute malicious scripts in the context of a victim's browser. The vulnerability arises from improper input validation when processing the echostr argument, creating an opening for malicious actors to inject harmful code that can be executed by unsuspecting users.
The technical exploitation of this vulnerability occurs through the manipulation of the echostr parameter within the validToken function, which serves as a critical entry point for cross-site scripting attacks. When the application processes this parameter without adequate sanitization or validation, it creates an environment where attacker-controlled content can be interpreted as executable JavaScript code by web browsers. The remote attack vector means that threat actors can exploit this weakness from outside the local network, making it particularly dangerous for publicly accessible web applications. This type of vulnerability directly maps to CWE-79, which specifically addresses cross-site scripting flaws in web applications, and aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments or links.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities including session hijacking, data theft, and redirection to malicious sites. Given that wx-discuz operates under a rolling release model without clear versioning for affected and patched releases, administrators face particular challenges in determining their exposure level and implementing appropriate remediation measures. The continuous delivery approach, while beneficial for rapid feature deployment, complicates vulnerability management as it becomes difficult to track which specific code versions contain the flaw. Organizations using this application must consider implementing temporary mitigations such as input validation layers, web application firewalls, and monitoring for suspicious parameter values. The lack of specific version information also means that security teams should conduct comprehensive code reviews of the affected components and potentially implement runtime protections to prevent exploitation until a proper patch can be applied through the rolling release cycle.