Overview
CVE-2025-63211 is a stored cross-site scripting (XSS) vulnerability identified in Bridgetech VBC Server & Element Manager. This vulnerability affects firmware versions 6.5.0-9 through 6.5.0-10. An attacker can exploit this flaw to inject malicious scripts into the application, potentially compromising user accounts and system integrity.
Technical Details
The vulnerability resides in the /vbc/core/userSetupDoc/userSetupDoc endpoint. Specifically, the addName parameter is vulnerable to stored XSS. An attacker can inject malicious JavaScript code into this parameter. When a user views the affected data, the injected script will execute in their browser within the context of the Bridgetech VBC Server & Element Manager application. This could allow the attacker to steal cookies, redirect the user to a malicious website, or perform other actions on behalf of the user.
CVSS Analysis
As of the publication of this article, the CVSS score for CVE-2025-63211 is currently unavailable (N/A) as well as the severity (N/A). This is because the CVSS score is assigned by NVD or vendor after analyzing the vulnerability. Awaiting the CVSS score before deciding the remediation approach is not advisable. Please patch immediately when a patch becomes available. The impact of stored XSS vulnerabilities can be significant, warranting immediate attention. Awaiting for the official CVSS is not recommended.
Possible Impact
The successful exploitation of this vulnerability could have several serious consequences:
- Account Compromise: Attackers could steal user credentials and gain unauthorized access to user accounts.
- Data Theft: Sensitive data stored within the Bridgetech VBC Server & Element Manager could be accessed and exfiltrated.
- Malware Distribution: The injected script could redirect users to malicious websites, leading to malware infections.
- Defacement: The application’s interface could be modified or defaced, damaging the organization’s reputation.
- Privilege Escalation: Depending on the privileges of the compromised account, attackers may be able to escalate their privileges and gain control of the system.
Mitigation and Patch Steps
To mitigate the risk posed by CVE-2025-63211, the following steps are recommended:
- Apply the Patch: Immediately apply the latest security patch released by Bridgetech. Check the Bridgetech official website for the availability of the update.
- Input Validation: If a patch is not yet available, implement strict input validation on the
addNameparameter to prevent the injection of malicious scripts. Sanitize all user-supplied data before it is stored in the database. - Output Encoding: Ensure that all data retrieved from the database and displayed to users is properly encoded to prevent XSS attacks.
- Web Application Firewall (WAF): Consider deploying a Web Application Firewall (WAF) to detect and block XSS attacks.
- Regular Security Audits: Conduct regular security audits and penetration testing to identify and address potential vulnerabilities.
References
Bridgetech Official Website
CVE-2025-63211 Vulnerability Research
