CVE-2025-6105: Jflyfox Jfinal CMS CSRF Vulnerability

CVE-2025-6105 Overview

CVE-2025-6105 is a Cross-Site Request Forgery (CSRF) vulnerability affecting jflyfox jfinal_cms version 5.0.1. The flaw resides in unspecified code within the HOME.java file and is triggered through manipulation of the Logout argument. An attacker can exploit this issue remotely by tricking an authenticated user into visiting a crafted page or link. The exploit details have been disclosed publicly, increasing the likelihood of opportunistic abuse. According to the disclosure, the vendor was contacted prior to publication but did not respond. The weakness is tracked under CWE-352.

Critical Impact
Remote attackers can forge logout requests against authenticated jfinal_cms 5.0.1 users, disrupting active sessions without user consent.

Affected Products

jflyfox jfinal_cms 5.0.1
Component: HOME.java (Logout handler)
CPE: cpe:2.3:a:jflyfox:jfinal_cms:5.0.1:*:*:*:*:*:*:*

Discovery Timeline

2025-06-16 - CVE-2025-6105 published to NVD
2026-04-29 - Last updated in NVD database

Technical Details for CVE-2025-6105

Vulnerability Analysis

The vulnerability is a classic Cross-Site Request Forgery affecting the logout functionality of jfinal_cms 5.0.1. The application processes the Logout action in HOME.java without validating that the request originated from a trusted user interaction. There is no anti-CSRF token, no Origin/Referer validation, and no requirement for a state-changing request to be issued via POST with verified parameters. An attacker who controls any third-party page can force authenticated victims to submit a logout request to the jfinal_cms instance simply by visiting the malicious page. While the direct impact is limited to terminating a user session, the issue demonstrates a broader absence of CSRF protections in state-changing endpoints. User interaction is required to trigger the attack.

Root Cause

The root cause is missing CSRF protection on the logout endpoint exposed through HOME.java. The application accepts the Logout request based solely on the user's ambient session credentials without verifying intent through a synchronizer token, double-submit cookie, or SameSite cookie enforcement. This is a direct instance of CWE-352: Cross-Site Request Forgery.

Attack Vector

Exploitation is network-based and requires user interaction. An attacker hosts a page containing an auto-submitting form or image tag pointing to the vulnerable logout URL on a jfinal_cms 5.0.1 instance. When an authenticated user visits the attacker-controlled page, the browser attaches session cookies and issues the logout request, terminating the user's session. The exploit is described in the public GitHub issue tracking CVE-2025-6105 and indexed under VulDB #312574.

No verified exploit code is available for inclusion. Refer to the public references for technical specifics.

Detection Methods for CVE-2025-6105

Indicators of Compromise

Unexpected Logout requests in jfinal_cms access logs containing cross-origin Referer headers or no Referer at all.
Clusters of session terminations across multiple users in short time windows, indicating mass CSRF abuse.
Inbound requests to the logout handler in HOME.java originating from unfamiliar external domains.

Detection Strategies

Inspect web server and application logs for logout requests whose Referer or Origin headers do not match the application's own hostname.
Correlate user complaints about sudden session loss with HTTP request timestamps in jfinal_cms logs.
Deploy a WAF rule that flags state-changing GET requests to the logout endpoint missing an anti-CSRF token.

Monitoring Recommendations

Enable verbose access logging on the jfinal_cms reverse proxy or application server to capture Referer, Origin, and cookie metadata.
Track the rate of logout events per user and per source IP to surface anomalous CSRF-driven spikes.
Alert on logout requests preceded by no prior authenticated user navigation within the same session.

How to Mitigate CVE-2025-6105

Immediate Actions Required

Restrict access to jfinal_cms 5.0.1 administrative and authenticated interfaces to trusted networks or VPN until a fix is available.
Configure session cookies with SameSite=Strict or SameSite=Lax to block cross-site cookie attachment on the logout endpoint.
Add a server-side anti-CSRF token requirement to the Logout handler in HOME.java if maintaining a private fork.
Educate authenticated users to avoid clicking untrusted links while logged into the CMS.

Patch Information

No vendor patch is available. The disclosure notes that the jflyfox maintainers were contacted prior to publication but did not respond. Organizations running jfinal_cms 5.0.1 should monitor the project repository and VulDB entry #312574 for future updates, or apply private code-level mitigations.

Workarounds

Implement a reverse-proxy rule that rejects requests to the logout path when the Referer or Origin header does not match the CMS hostname.
Set authentication cookies to SameSite=Strict to prevent cross-origin submission of the logout request.
Require POST with a per-session CSRF token for all state-changing actions, including logout, via a custom servlet filter.

bash

# Example nginx snippet enforcing same-origin Referer on the logout endpoint
location ~ ^/.*[Ll]ogout.* {
    if ($http_referer !~* "^https?://cms\.example\.com/") {
        return 403;
    }
    proxy_pass http://jfinal_cms_backend;
}