CVE-2025-5888: Jsnjfz Webstack-guns CSRF Vulnerability

CVE-2025-5888 Overview

CVE-2025-5888 is a Cross-Site Request Forgery (CSRF) vulnerability in jsnjfz WebStack-Guns 1.0. The flaw allows a remote attacker to trigger unauthorized state-changing actions in the application when an authenticated user visits an attacker-controlled page. The vulnerability is classified under CWE-352 and requires user interaction to succeed. The exploit details have been publicly disclosed, and the vendor did not respond to disclosure attempts, leaving deployments without an official patch.

Critical Impact
Remote attackers can coerce authenticated users into performing unintended actions in WebStack-Guns 1.0, resulting in limited integrity impact on application state.

Affected Products

jsnjfz WebStack-Guns 1.0
Deployments referencing CPE cpe:2.3:a:jsnjfz:webstack-guns:1.0
Forks and derivatives based on WebStack-Guns 1.0

Discovery Timeline

2025-06-09 - CVE-2025-5888 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-5888

Vulnerability Analysis

The vulnerability resides in an unspecified request handler within WebStack-Guns 1.0. The application accepts state-changing HTTP requests without validating an anti-CSRF token or verifying the request origin. An attacker who convinces an authenticated administrator or user to load a crafted page can trigger requests that execute under the victim's session context.

The issue is remotely exploitable over the network and requires user interaction, such as clicking a link or visiting a malicious site. Successful exploitation produces limited impact on integrity but does not directly expose data or degrade availability. Public disclosure of the exploit increases the risk of opportunistic abuse against exposed instances.

Root Cause

The root cause is missing CSRF protection [CWE-352] on sensitive endpoints. WebStack-Guns 1.0 does not enforce synchronizer tokens, double-submit cookies, or SameSite cookie attributes on session cookies. Requests are authorized solely on the presence of a valid session, allowing cross-origin requests to be honored.

Attack Vector

Exploitation follows a standard CSRF pattern. An attacker hosts a page that submits a forged POST or GET request to a WebStack-Guns endpoint. When an authenticated victim loads the page, the browser attaches the session cookie and the server processes the request as legitimate. Details of the disclosed proof of concept are available in the GitHub issue tracker and the VulDB entry #311659.

Detection Methods for CVE-2025-5888

Indicators of Compromise

Unexpected state changes in WebStack-Guns performed with valid session cookies but unusual Referer or Origin headers.
HTTP POST requests to WebStack-Guns endpoints originating from third-party domains in browser or proxy logs.
Administrative actions logged shortly after users visited external URLs delivered by email or chat.

Detection Strategies

Inspect web server and reverse proxy logs for requests where the Referer or Origin header does not match the WebStack-Guns hostname.
Deploy a web application firewall rule that flags requests to state-changing endpoints missing a CSRF token parameter.
Correlate authentication session identifiers with request origins to surface cross-site submission patterns.

Monitoring Recommendations

Enable verbose access logging on all WebStack-Guns endpoints that modify data or configuration.
Alert on outbound clicks from internal users to unknown domains followed by administrative actions within a short time window.
Review browser telemetry, if available, for requests generated from non-application origins.

How to Mitigate CVE-2025-5888

Immediate Actions Required

Restrict access to WebStack-Guns 1.0 to trusted networks or place it behind an authenticated reverse proxy that enforces origin checks.
Configure session cookies with SameSite=Strict or SameSite=Lax and the Secure and HttpOnly flags at the reverse proxy layer.
Instruct administrators to log out of WebStack-Guns before browsing untrusted content and to use isolated browser profiles for administration.

Patch Information

No vendor patch is available. According to the disclosure, the vendor was contacted but did not respond. Consult the VulDB advisory and the reporter's GitHub issue for updates. Organizations should evaluate migrating away from WebStack-Guns 1.0 until a fix is released.

Workarounds

Deploy a reverse proxy or WAF that validates the Origin and Referer headers on all POST, PUT, DELETE, and PATCH requests to WebStack-Guns.
Add a custom middleware or proxy rule that rejects state-changing requests lacking a synchronizer token cookie set at login.
Limit browser exposure by binding the WebStack-Guns interface to internal interfaces and requiring VPN access.

bash

# Example nginx configuration to enforce Origin header validation
map $http_origin $csrf_allowed {
    default 0;
    "https://webstack.internal.example.com" 1;
}

server {
    listen 443 ssl;
    server_name webstack.internal.example.com;

    location / {
        if ($request_method ~ ^(POST|PUT|DELETE|PATCH)$) {
            set $check "${csrf_allowed}";
            if ($check = 0) {
                return 403;
            }
        }
        proxy_pass http://127.0.0.1:8080;
        proxy_cookie_flags ~ Secure HttpOnly SameSite=Strict;
    }
}