CVE-2025-5183 is an open redirect vulnerability identified in the Summer Pearl Group Vacation Rental Management Platform versions up to 1.0.1. The vulnerability arises from improper handling of the 'Host' argument within the platform's Header Handler component. By manipulating this argument, an attacker can craft URLs that redirect users to arbitrary external sites. This flaw can be exploited remotely without requiring authentication, although user interaction is necessary to trigger the redirect (e.g., clicking a malicious link). The vulnerability has been assigned a CVSS 4.0 base score of 5.1, indicating a medium severity level. The attack vector is network-based with low attack complexity and no privileges required, but user interaction is needed. The impact primarily affects the integrity of user navigation and confidentiality, as users may be redirected to phishing or malicious sites, potentially leading to credential theft or malware infection. The vulnerability does not affect system availability or require elevated privileges, and no known exploits are currently reported in the wild. The vendor has addressed this issue in version 1.0.2, recommending an upgrade to mitigate the risk.

For European organizations using the Summer Pearl Group Vacation Rental Management Platform, this vulnerability poses a risk mainly to end users and customers interacting with the platform. Attackers could exploit the open redirect to conduct phishing campaigns, redirecting users to malicious websites that harvest credentials or distribute malware. This can lead to reputational damage, loss of customer trust, and potential regulatory scrutiny under GDPR if personal data is compromised. The risk is heightened for organizations with a large customer base or those operating in countries with strict data protection laws. While the vulnerability does not directly compromise backend systems or data integrity, the indirect effects through social engineering and user deception can have significant operational and financial consequences.

Organizations should promptly upgrade the Summer Pearl Group Vacation Rental Management Platform to version 1.0.2 or later, where the vulnerability is fixed. Until the upgrade is applied, administrators should implement strict input validation and sanitization on the 'Host' header to prevent manipulation. Web application firewalls (WAFs) can be configured to detect and block suspicious redirect patterns. Additionally, organizations should educate users about the risks of clicking on unexpected links and implement monitoring to detect unusual redirect activities. Regular security assessments and penetration testing focusing on URL handling and redirect mechanisms are recommended to identify similar issues proactively. Finally, incident response plans should include procedures for addressing phishing campaigns leveraging this vulnerability.