CVE-2025-7554 is a cross-site scripting (XSS) vulnerability identified in the Sapido RB-1802 router, specifically version 1.0.32. The vulnerability resides in the URL Filtering Page component, within the file urlfilter.asp. The issue arises from improper sanitization or validation of the 'URL address' argument, which allows an attacker to inject malicious scripts. This vulnerability can be exploited remotely without requiring authentication, although the CVSS vector indicates a requirement for high privileges (PR:H) and user interaction (UI:P), suggesting that exploitation might require an authenticated user to interact with a crafted URL or page. The vulnerability does not affect confidentiality or availability significantly but impacts integrity to a limited extent. The CVSS score of 4.8 (medium severity) reflects these factors. No known exploits are currently observed in the wild, but the exploit details have been publicly disclosed, increasing the risk of future exploitation. The vulnerability could allow attackers to execute arbitrary scripts in the context of the victim's browser, potentially leading to session hijacking, redirection to malicious sites, or other client-side attacks. Since the affected product is a router, exploitation could impact network management interfaces, potentially leading to broader network security issues if administrative sessions are compromised.

For European organizations, the impact of this vulnerability depends largely on the deployment of the Sapido RB-1802 routers within their network infrastructure. If these routers are used in enterprise or critical infrastructure environments, successful exploitation could lead to unauthorized access to router management interfaces, enabling attackers to manipulate network traffic or gain further footholds. The XSS vulnerability primarily threatens the integrity of user sessions and could facilitate phishing or social engineering attacks targeting network administrators. While the direct impact on confidentiality and availability is limited, the indirect consequences could be significant if attackers leverage this vulnerability to escalate privileges or pivot within the network. Organizations in sectors with stringent data protection requirements, such as finance, healthcare, and government, could face compliance risks if such vulnerabilities are exploited. Moreover, since the attack vector is remote, attackers can target exposed management interfaces accessible from the internet, increasing the risk for organizations with insufficient network segmentation or firewall protections.

To mitigate this vulnerability, European organizations should first verify if Sapido RB-1802 routers version 1.0.32 are deployed within their environment. If so, immediate steps include restricting access to the router's management interface to trusted networks only, preferably via VPN or secure management channels. Implement strict input validation and sanitization on the URL Filtering Page if custom firmware or configurations are possible. Monitor network traffic for unusual patterns that may indicate exploitation attempts. Since no official patch or update is currently available, organizations should engage with Sapido support for potential firmware updates or workarounds. Additionally, educating network administrators about the risks of interacting with suspicious URLs and enforcing multi-factor authentication for router management interfaces can reduce exploitation likelihood. Regularly auditing router configurations and applying network segmentation to isolate management interfaces from general user access will further limit exposure. Finally, deploying web application firewalls (WAFs) or intrusion detection systems (IDS) capable of detecting XSS attempts targeting router interfaces can provide an additional security layer.