CVE-2025-5183: Summer Pearl Group Vacation Rental Open Redirect

CVE-2025-5183 Overview

CVE-2025-5183 is an open redirect vulnerability in the Summer Pearl Group Vacation Rental Management Platform through version 1.0.1. The flaw resides in the Header Handler component, where manipulation of the Host header enables redirection to attacker-controlled destinations. The issue is classified as [CWE-601] Open Redirect and can be exploited remotely by a low-privileged authenticated user with victim interaction. Summer Pearl Group addressed the issue in version 1.0.2.

Critical Impact
Attackers can craft URLs that redirect authenticated users from the legitimate platform to malicious sites, enabling phishing, credential theft, and malware delivery campaigns that leverage the platform's trusted domain.

Affected Products

Summer Pearl Group Vacation Rental Management Platform versions up to and including 1.0.1
Component: Header Handler (Host header processing)
Fixed release: version 1.0.2

Discovery Timeline

2025-05-26 - CVE-2025-5183 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-5183

Vulnerability Analysis

The vulnerability is an open redirect in the platform's Header Handler component. The application trusts the incoming HTTP Host header when constructing redirection URLs. An attacker who controls or spoofs the Host value can force the application to issue redirects pointing to an arbitrary external destination.

Open redirects are frequently abused in phishing campaigns. The victim sees a legitimate domain in the initial link, which increases the likelihood they will follow the redirect to an attacker-controlled page. Because the flaw requires user interaction and low privileges, exploitation typically pairs a crafted link with social engineering.

The issue is limited to integrity impact on the affected system and does not directly expose confidential data or degrade availability. However, the phishing potential elevates the practical risk when the platform is used by property managers or renters who handle payment and personal information.

Root Cause

The root cause is missing validation of the Host header before it is incorporated into redirect responses. The Header Handler component accepts client-supplied header values without cross-checking them against an allowlist of trusted hostnames, satisfying the conditions for [CWE-601] URL Redirection to Untrusted Site.

Attack Vector

Exploitation requires network access to the application and a valid low-privilege session. The attacker sends a crafted request with a manipulated Host header, then delivers the resulting redirect link to a victim through email or messaging. When the victim clicks the link and completes an action on the legitimate site, the server issues a redirect to the attacker's chosen destination.

No verified proof-of-concept code is published for this issue. Refer to the Summer Pearl Group Releases page and VulDB entry #310271 for vendor and third-party details.

Detection Methods for CVE-2025-5183

Indicators of Compromise

HTTP requests to the Summer Pearl Group platform containing Host header values that do not match the deployed application's canonical hostname.
Outbound 3xx redirect responses from the platform pointing to external, non-corporate domains.
Spike in user reports of unexpected redirects after clicking legitimate-looking Summer Pearl Group URLs.

Detection Strategies

Inspect web server and reverse proxy access logs for mismatches between the request Host header and the server's expected hostname.
Alert on Location response headers in redirect responses that reference domains outside the organization's approved list.
Correlate suspicious redirects with authenticated user sessions to identify targeted phishing attempts.

Monitoring Recommendations

Enable verbose logging of HTTP request headers, including Host, Referer, and Origin, at the web application firewall or reverse proxy layer.
Feed application and proxy logs into a centralized analytics platform to build baselines for Host header values and redirect destinations.
Monitor URL reputation services for newly registered lookalike domains that could be paired with redirect abuse against the platform.

How to Mitigate CVE-2025-5183

Immediate Actions Required

Upgrade the Summer Pearl Group Vacation Rental Management Platform to version 1.0.2 or later.
Inventory all deployments still running versions up to 1.0.1 and prioritize internet-facing instances.
Notify platform users about the potential for phishing links that appear to originate from the legitimate domain.

Patch Information

Summer Pearl Group resolved this issue in version 1.0.2. Download and release notes are available on the Summer Pearl Group Releases page. Additional advisory context is tracked under VulDB CTI #310271.

Workarounds

Configure the web server or reverse proxy to enforce a fixed, expected Host header and reject requests with mismatched values.
Deploy a web application firewall rule that blocks or normalizes requests where the Host header does not match the platform's canonical FQDN.
Restrict redirect destinations at the proxy layer to an allowlist of trusted domains until the patch is applied.

bash

# Example nginx configuration to reject unexpected Host headers
server {
    listen 443 ssl;
    server_name rentals.example.com;

    if ($host != "rentals.example.com") {
        return 400;
    }

    # Proxy to the Summer Pearl Group application
    location / {
        proxy_set_header Host $host;
        proxy_pass http://spgpm_backend;
    }
}