CVE-2025-5505 in A3002RU
Summary
by MITRE • 06/03/2025
A vulnerability was found in TOTOLINK A3002RU 2.1.1-B20230720.1011 and classified as problematic. This issue affects some unknown processing of the file /boafrm/formPortFw of the component Virtual Server Page. The manipulation of the argument service_type leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 06/09/2026
This vulnerability resides within the TOTOLINK A3002RU router firmware version 2.1.1-B20230720.1011 and represents a cross site scripting flaw that manifests through the Virtual Server Page component. The specific attack vector involves manipulation of the service_type argument within the /boafrm/formPortFw file processing logic, which allows an attacker to inject malicious scripts into web pages viewed by other users. The vulnerability is classified as problematic due to its potential for remote exploitation without requiring any authentication or privileged access, making it particularly dangerous in networked environments where unauthorized users might gain access to the device's web interface. The attack surface is broad as any user who can access the router's administrative web portal could potentially be targeted by this XSS payload, which could lead to session hijacking, credential theft, or redirection to malicious sites.
The technical implementation of this vulnerability stems from inadequate input validation and output sanitization within the router's web application framework. When the service_type parameter is processed through the formPortFw handler, the application fails to properly escape or validate user-supplied data before incorporating it into dynamic web content. This failure creates an XSS opportunity where malicious scripts can be executed in the context of the victim's browser session. The vulnerability 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, though in this case the attack vector is more direct through web interface manipulation. The absence of proper input sanitization mechanisms allows attackers to inject script code that executes in the victim's browser when they view pages containing the maliciously crafted parameters.
The operational impact of this vulnerability extends beyond simple script execution as it can enable more sophisticated attacks within the network environment. An attacker could potentially harvest session cookies from authenticated users, redirect them to phishing sites, or even inject malicious scripts that could compromise the entire network by exploiting other vulnerabilities present in the router's interface. The remote exploit capability means that attackers do not need physical access to the device or local network connectivity to initiate the attack, making it particularly concerning for organizations that rely on these devices for network security. The public disclosure of this exploit without vendor response creates a dangerous situation where network administrators are left without official patches or mitigation guidance, potentially leaving thousands of devices vulnerable to exploitation.
Organizations should immediately implement network segmentation to isolate affected devices from critical systems and establish monitoring for suspicious web traffic patterns that might indicate exploitation attempts. The most effective immediate mitigation involves disabling the Virtual Server Page functionality if it is not required for business operations, though this may limit legitimate network configuration capabilities. Network administrators should also consider implementing web application firewalls or intrusion detection systems that can detect and block XSS attack patterns targeting known vulnerable parameters. The lack of vendor response to this disclosure is particularly concerning and suggests that the device may be end-of-life or unsupported, which compounds the security risk for organizations still using these devices. Regular network scans should be conducted to identify all affected devices and ensure that proper network access controls are in place to prevent unauthorized access to the web interfaces. Long-term solutions require upgrading to supported firmware versions or replacing affected devices with more secure alternatives that have proper input validation and output encoding mechanisms in place.