CVE-2025-52392: Soosyze CMS Auth Bypass Vulnerability

CVE-2025-52392 Overview

CVE-2025-52392 is a brute-force authentication vulnerability in Soosyze CMS 2.0. The /user/login endpoint lacks rate-limiting and account lockout mechanisms. Attackers can submit unlimited login attempts against valid usernames without triggering any defensive response. Successful exploitation grants unauthorized access to user or administrative accounts, depending on the credentials guessed.

The issue is classified as CWE-307: Improper Restriction of Excessive Authentication Attempts. A public proof-of-concept exists on Exploit-DB, increasing the likelihood of opportunistic exploitation against exposed Soosyze installations.

Critical Impact

Attackers can gain unauthorized administrative access to Soosyze CMS 2.0 by automating credential guessing against /user/login without triggering lockouts.

Affected Products

• Soosyze CMS 2.0
• Deployments exposing /user/login to untrusted networks
• Installations without upstream rate-limiting controls

Discovery Timeline

• 2025-08-13 - CVE-2025-52392 published to NVD
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-52392

Vulnerability Analysis

Soosyze CMS 2.0 exposes an authentication endpoint at /user/login that accepts username and password submissions over HTTP POST. The application processes each request independently and returns a response indicating success or failure. No counter tracks failed attempts against a given account or source IP address.

An attacker can script thousands of authentication requests per minute against known usernames. Common wordlists targeting admin, administrator, or enumerated user accounts are effective against weak credentials. The endpoint also does not implement CAPTCHA challenges, progressive delays, or IP-based throttling.

Refer to the GitBook CVE-2025-52392 Analysis and the Exploit-DB entry #52416 for the published proof-of-concept.

Root Cause

The login controller in Soosyze CMS 2.0 lacks state tracking for authentication failures. The codebase does not persist failed-attempt counts to the database, cache, or session store. Without this state, the application cannot enforce lockout thresholds or exponential back-off. Discussion of the missing control appears in GitHub Issue #269.

Attack Vector

Exploitation requires only network access to the login endpoint. An attacker sends automated POST requests to /user/login using tools such as Hydra, Burp Intruder, or custom scripts. Each request contains a candidate username and password pair. The attacker iterates through a password dictionary until a successful authentication response is returned. User interaction is limited to the attacker acting as an unauthenticated client.

No verified code examples are available. See the linked GitBook analysis and Exploit-DB entry for reproduction steps.

Detection Methods for CVE-2025-52392

Indicators of Compromise

• High volume of POST requests to /user/login from a single source IP within a short window
• Repeated HTTP 200 or redirect responses following long sequences of failed authentication responses
• Login attempts targeting the same username with varying password parameters
• User-Agent strings associated with automation tools such as hydra, python-requests, or curl

Detection Strategies

• Deploy web server access log analysis to flag more than 10 failed login attempts per minute per source IP
• Correlate authentication failure events with subsequent successful logins from the same IP
• Alert on distributed attempts where many source IPs target the same username, indicating credential stuffing

Monitoring Recommendations

• Forward Soosyze CMS access logs and application logs to a centralized SIEM for correlation
• Monitor administrative account logins from previously unseen IP addresses or geographies
• Track baseline login volumes and alert on statistical deviations from normal traffic

How to Mitigate CVE-2025-52392

Immediate Actions Required

• Restrict access to /user/login using IP allow-listing or VPN gating where feasible
• Place a reverse proxy or web application firewall in front of Soosyze CMS to enforce rate limits
• Enforce strong password policies and rotate credentials for all administrative accounts
• Enable multi-factor authentication at the reverse proxy layer if the application does not support it natively

Patch Information

At the time of the last NVD update on 2026-06-17, no official vendor patch is referenced in the CVE record. Track the GitHub Issue #269 Discussion for upstream remediation progress. Until a patched release is available, apply the compensating controls described below.

Workarounds

• Configure Nginx or Apache with request rate limiting on /user/login (for example, limit_req_zone in Nginx)
• Deploy Fail2Ban rules that parse Soosyze authentication logs and block offending source IPs
• Implement CAPTCHA at the reverse proxy layer using ModSecurity or a WAF plugin
• Reduce attack surface by moving the CMS administrative interface to a non-default path

# Example Nginx rate-limit configuration for /user/login
http {
    limit_req_zone $binary_remote_addr zone=login_zone:10m rate=5r/m;

    server {
        location = /user/login {
            limit_req zone=login_zone burst=3 nodelay;
            proxy_pass http://soosyze_backend;
        }
    }
}