CVE-2025-8117: Widzialni Pad CMS Auth Bypass Vulnerability

CVE-2025-8117 Overview

CVE-2025-8117 is a high-severity vulnerability in PAD CMS by Widzialni that allows unauthenticated attackers to change the password of any user who has never invoked the password reset feature. The flaw stems from improper initialization of a parameter used in the password recovery workflow [CWE-909]. All three product templates are affected: www, bip, and www+bip. The vendor has declared the product End-Of-Life and will not release a patch.

Critical Impact
Remote attackers can take over administrator and user accounts without authentication, gaining full control of integrity-sensitive CMS data and content.

Affected Products

Widzialni PAD CMS - template www
Widzialni PAD CMS - template bip
Widzialni PAD CMS - template www+bip

Discovery Timeline

2025-09-30 - CVE-2025-8117 published to NVD
2025-11-26 - Last updated in NVD database

Technical Details for CVE-2025-8117

Vulnerability Analysis

The vulnerability resides in PAD CMS's password recovery routine. The application fails to properly initialize a parameter that controls which account a password reset request applies to. Because the parameter holds a predictable or empty default state for users who have never triggered the reset workflow, an attacker can submit a crafted recovery request that the application accepts as valid.

The outcome is account takeover. An unauthenticated network attacker can set a new password for any targeted account that has not previously used the reset functionality. This includes high-privilege administrator accounts created during deployment but never used to recover credentials.

The CWE-909 classification (Missing Initialization of Resource) aligns with the root cause. The recovery handler trusts state that was never assigned a secure value, allowing it to be matched or bypassed by attacker-supplied input.

Root Cause

The password recovery component does not initialize a server-side parameter, such as a reset token or comparison value, before evaluating an inbound reset request. Accounts that have never gone through the reset flow retain the uninitialized default. The recovery logic treats this default as a legitimate match, permitting password changes without prior token issuance or identity verification.

Attack Vector

Exploitation requires only network access to the CMS. No authentication, user interaction, or elevated privileges are needed. An attacker submits a password reset request targeting a chosen username and supplies values that satisfy the uninitialized parameter check. The CMS then accepts the new password and writes it to the user record. Refer to the CERT Polska Security Advisory for additional technical context.

Detection Methods for CVE-2025-8117

Indicators of Compromise

Unexpected password change events in CMS audit logs for accounts that never initiated a reset.
HTTP POST requests to the password recovery endpoint with anomalous or empty token parameters.
Successful administrator logins from unfamiliar IP addresses immediately following password reset activity.
New or modified content, users, or configuration entries authored by previously dormant accounts.

Detection Strategies

Inspect web server access logs for repeated requests to the PAD CMS password recovery URL targeting multiple usernames.
Correlate password change database writes with the absence of a preceding reset token issuance.
Alert on logins to accounts that have been inactive for extended periods, particularly administrative roles.

Monitoring Recommendations

Enable verbose authentication and account management logging on the PAD CMS host and forward events to a central SIEM.
Monitor outbound traffic from the CMS server for signs of webshell deployment or data exfiltration after suspected takeover.
Track filesystem changes to CMS template directories (www, bip, www+bip) to detect unauthorized content modification.

How to Mitigate CVE-2025-8117

Immediate Actions Required

Force a password reset for every account in the CMS, prioritizing administrators and dormant accounts.
Restrict network access to the PAD CMS administrative interface using IP allowlists or a VPN.
Audit user accounts and remove any unrecognized or unused entries to reduce the attack surface.
Plan migration to a supported CMS platform, as PAD CMS is End-Of-Life and will not receive patches.

Patch Information

No patch is available. The vendor has confirmed the product is End-Of-Life and will not publish a fix for CVE-2025-8117. Migration to an actively maintained CMS is the only complete remediation. See the CERT Polska Security Advisory for vendor status confirmation.

Workarounds

Place the CMS behind a Web Application Firewall (WAF) with rules that block requests to the password recovery endpoint from unauthorized sources.
Disable the password recovery feature entirely if the CMS configuration permits, and handle resets manually through database administration.
Require multi-factor authentication at a reverse proxy layer in front of the CMS administrative interface.
Isolate the CMS server in a segmented network zone with strict egress filtering until migration is complete.

bash

# Example: Block external access to PAD CMS password recovery endpoint at nginx
location ~* /(reset|recover|password)/ {
    allow 10.0.0.0/8;
    deny all;
    return 403;
}