Overview
CVE-2025-55124 is a reflected Cross-Site Scripting (XSS) vulnerability identified in Revive Adserver version 6.0.0 and later. This vulnerability exists within the `banner-zone.php` script due to improper neutralization of user-supplied input. An attacker can exploit this flaw to inject malicious scripts into a user’s browser when they visit a specially crafted URL. This can lead to session hijacking, defacement, or redirection to malicious websites.
Technical Details
The vulnerability stems from the `banner-zone.php` script’s failure to properly sanitize or encode user-provided input before reflecting it back in the HTML output. Specifically, a malicious actor can craft a URL containing JavaScript code within a vulnerable parameter. When a user clicks on this crafted link, the server reflects the unsanitized script back to the user’s browser, which then executes the malicious code. The exact parameter vulnerable to this XSS attack is not defined in the provided information but resides within the processing of `banner-zone.php` script arguments.
CVSS Analysis
The provided information indicates that the CVSS score is N/A, and severity is also N/A. This suggests that the vulnerability report might be incomplete or still under evaluation at the time of this publication. A proper CVSS score will provide valuable information regarding the overall risk associated with the vulnerability. Typically, XSS vulnerabilities range from Medium to High severity, depending on the impact and exploitability.
Possible Impact
A successful XSS attack exploiting CVE-2025-55124 can have several detrimental consequences:
- Session Hijacking: Attackers can steal a user’s session cookies, allowing them to impersonate the user and gain unauthorized access to the Revive Adserver platform.
- Website Defacement: Malicious scripts can alter the appearance of the affected web pages, potentially damaging the reputation of the website.
- Redirection to Malicious Websites: Users can be redirected to phishing sites or websites hosting malware, leading to further compromise.
- Information Theft: Sensitive information displayed on the affected pages could be stolen by the attacker.
Mitigation and Patch Steps
To mitigate the risk posed by CVE-2025-55124, it is crucial to take the following steps:
- Upgrade Revive Adserver: Check for and apply the latest available version of Revive Adserver. The vendor should release a patch that addresses this vulnerability by properly sanitizing user input in `banner-zone.php`. Consult the Revive Adserver website for update instructions.
- Input Validation and Output Encoding: Implement robust input validation and output encoding mechanisms. Sanitize user input to remove or escape potentially harmful characters before displaying it on web pages. Consider using a web application firewall (WAF) to filter out malicious requests.
- Web Application Firewall (WAF): Deploy a WAF to detect and block XSS attacks. Configure the WAF to specifically address the identified vulnerability pattern.
- Security Audits: Regularly conduct security audits and penetration testing to identify and address potential vulnerabilities in your Revive Adserver installation.
- Educate Users: Educate users about the risks of clicking on suspicious links and the importance of verifying the authenticity of websites before entering sensitive information.
