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

CVE-2025-8117 Overview

CVE-2025-8117 affects PAD CMS, a content management system developed by Widzialni. The vulnerability stems from improper initialization of a parameter used in the password recovery workflow [CWE-909]. Attackers can change the password for any user account that has not previously invoked the reset password function. The flaw impacts all three product templates: www, bip, and www+bip. PAD CMS has reached End-of-Life status, and the vendor has confirmed no patches will be released.

Critical Impact

Unauthenticated attackers can hijack any user account, including administrative accounts, by abusing the password recovery flow without user interaction.

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 the National Vulnerability Database (NVD)
• 2025-11-26 - Last updated in NVD database

Technical Details for CVE-2025-8117

Vulnerability Analysis

The vulnerability resides in the password recovery component of PAD CMS. A parameter used to validate password reset requests is not properly initialized before use. When a user account has never triggered the password reset workflow, this uninitialized parameter retains a predictable or default value. Attackers can submit crafted password recovery requests that pass server-side checks against this uninitialized value, allowing them to set a new password for the target account.

The issue is exploitable over the network without authentication or user interaction. Successful exploitation results in full account takeover with high impact to integrity. Confidentiality and availability are not directly affected by the password change itself, but post-exploitation access enables further compromise of CMS-managed content and administrative functions.

Root Cause

The root cause is improper initialization of a security-relevant parameter, classified under [CWE-909] Missing Initialization of Resource. Because the parameter is not assigned a unique, unpredictable value at account creation, accounts that never used the reset workflow remain in a state where the recovery check can be bypassed. The vendor classifies the affected product as End-of-Life and will not publish a fix.

Attack Vector

Attackers send password recovery requests to the CMS endpoint targeting accounts that have never used the reset function. The uninitialized parameter accepts attacker-supplied or predictable values, completing the password change flow. No prior credentials, tokens, or social engineering are required. Refer to the CERT Polska advisory for technical details on the recovery flow and parameter handling.

Detection Methods for CVE-2025-8117

Indicators of Compromise

• Password change events for user accounts that have no preceding password reset request in application logs.
• HTTP POST requests to PAD CMS password recovery endpoints from unfamiliar IP addresses or in rapid succession across multiple accounts.
• Unexpected administrative logins following password recovery activity targeting privileged accounts.

Detection Strategies

• Correlate password change events with the absence of a corresponding user-initiated reset request in web server and application logs.
• Monitor for enumeration patterns against the password recovery endpoint, including high request volume or sequential username probing.
• Alert on successful authentication from new geographic locations or devices immediately after password reset traffic.

Monitoring Recommendations

• Forward web application and authentication logs to a centralized SIEM for correlation.
• Track administrator account activity, including session creation, role changes, and content modifications.
• Review user account inventories to identify dormant accounts that have never performed password resets, as these are the most exposed.

How to Mitigate CVE-2025-8117

Immediate Actions Required

• Force a password reset for every user account on the platform to populate the recovery parameter with a secure value.
• Restrict access to PAD CMS administrative interfaces using IP allowlisting or VPN-only access until migration is complete.
• Plan migration to a supported, actively maintained CMS, since PAD CMS is End-of-Life and will not receive patches.

Patch Information

No patch is available. The vendor has declared PAD CMS End-of-Life and will not publish fixes for this vulnerability. Migration to a supported platform is the only durable remediation.

Workarounds

• Deploy a web application firewall (WAF) rule to block or rate-limit requests to the password recovery endpoint.
• Disable the password recovery feature at the application or reverse proxy layer if administrators can reset passwords through other means.
• Audit all user accounts and trigger administrative password resets to eliminate accounts in the vulnerable uninitialized state.

# Example NGINX rule to block public access to the password recovery endpoint
location ~* /(reset|recover|password) {
    allow 10.0.0.0/8;
    deny all;
}