CVE-2025-6552: Hope-Boot Open Redirect Vulnerability

CVE-2025-6552 Overview

CVE-2025-6552 is an open redirect vulnerability in java-aodeng Hope-Boot 1.0.0. The flaw resides in the doLogin function of /src/main/java/com/hope/controller/WebController.java within the Login component. Attackers can manipulate the redirect_url argument to redirect authenticated users to attacker-controlled destinations. The issue is classified under CWE-601: URL Redirection to Untrusted Site. The exploit has been publicly disclosed, and the vendor did not respond to disclosure attempts.

Critical Impact
Attackers can craft malicious login URLs that redirect victims to phishing pages or malware distribution sites after authentication, enabling credential theft and social engineering attacks.

Affected Products

java-aodeng Hope-Boot 1.0.0
Login component (WebController.java)
doLogin function handling the redirect_url parameter

Discovery Timeline

2025-06-24 - CVE-2025-6552 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-6552

Vulnerability Analysis

The vulnerability is an open redirect flaw in the login workflow of Hope-Boot 1.0.0. The doLogin controller method accepts a user-supplied redirect_url parameter without validating whether the destination points to a trusted host. After successful authentication, the application forwards the browser to whatever URL the parameter contains.

Attackers exploit this by embedding an external URL into the login link and distributing it through phishing campaigns. Victims see a legitimate Hope-Boot login domain in the initial request, which increases trust. Once credentials are submitted, the server redirects them to the attacker's infrastructure.

The attack requires user interaction, which is reflected in the CVSS 4.0 vector component UI:P. Impact is limited to integrity of the victim's browsing session, not confidentiality of server data. See the GitHub proof-of-concept for technical details.

Root Cause

The root cause is missing validation of the redirect_url request parameter inside doLogin. The controller trusts client-supplied input and issues an HTTP redirect without allow-listing internal paths or verifying the target hostname.

Attack Vector

The vulnerability is exploitable remotely over the network. An attacker crafts a URL such as https://victim-host/login?redirect_url=https://attacker.example/phish and sends it to a target. After the user logs in, the server responds with a redirect to the attacker's domain, which can mimic the legitimate application to harvest further credentials or deliver malware.

Detection Methods for CVE-2025-6552

Indicators of Compromise

HTTP requests to the login endpoint containing a redirect_url parameter with an external or unexpected hostname
Referrer logs showing user sessions redirected off-domain immediately after authentication
Phishing reports referencing legitimate Hope-Boot login URLs with appended redirect_url query strings

Detection Strategies

Inspect web server access logs for redirect_url values that do not resolve to internal paths or approved domains
Deploy a web application firewall rule matching login requests where the redirect_url parameter contains a scheme (http:// or https://) or // prefix
Correlate authentication events with outbound HTTP 302 responses containing untrusted Location headers

Monitoring Recommendations

Baseline typical post-login redirect destinations and alert on deviations
Monitor threat intelligence feeds for phishing kits abusing Hope-Boot login flows
Enable browser telemetry to flag cross-origin redirects from authenticated sessions

How to Mitigate CVE-2025-6552

Immediate Actions Required

Restrict the redirect_url parameter to a server-side allow-list of internal paths
Remove or ignore the parameter until a validated fix is deployed
Educate users to inspect the destination address bar after logging in
Consider migrating away from Hope-Boot 1.0.0 given the unresponsive maintainer

Patch Information

No vendor patch is available. The maintainer of java-aodeng Hope-Boot did not respond to coordinated disclosure attempts recorded in VulDB #313692. Operators must apply source-level fixes manually or replace the affected component.

Workarounds

Modify WebController.doLogin to validate that redirect_url matches a relative path beginning with / and contains no protocol or host component
Implement a redirect indirection table where the client submits a short token that maps to a server-defined URL
Deploy WAF rules that strip or reject the redirect_url parameter when it contains external URLs

bash

# Example WAF rule (ModSecurity) blocking external redirect_url values on the login endpoint
SecRule REQUEST_URI "@beginsWith /login" \
    "chain,phase:2,deny,status:400,id:1006552,msg:'CVE-2025-6552 open redirect attempt'"
    SecRule ARGS:redirect_url "@rx ^(https?:)?//" \
        "t:none,t:lowercase"