CVE-2026-11515: Barangay Resident System Auth Bypass

CVE-2026-11515 Overview

CVE-2026-11515 is a hard-coded password vulnerability in SourceCodester Barangay Resident Profiling and Information Management System 1.0. The flaw resides in the passsword_reset.php file within the Password Reset Handler component. Manipulating the new_password argument with the input password123 triggers the use of a hard-coded credential, weakening account protection across the application. The issue is remotely exploitable without authentication or user interaction, and the exploit has been publicly disclosed. The vulnerability is classified under [CWE-255] (Credentials Management Errors).

Critical Impact
Remote attackers can leverage a hard-coded password in the reset workflow to access accounts on affected installations of the Barangay Resident Profiling and Information Management System without prior credentials.

Affected Products

SourceCodester Barangay Resident Profiling and Information Management System 1.0
Component: Password Reset Handler (passsword_reset.php)
Affected parameter: new_password

Discovery Timeline

2026-06-08 - CVE-2026-11515 published to NVD
2026-06-08 - Last updated in NVD database

Technical Details for CVE-2026-11515

Vulnerability Analysis

The vulnerability exists in the password reset workflow implemented by passsword_reset.php. The handler processes the new_password parameter but accepts or applies a hard-coded value (password123) instead of enforcing a user-supplied, validated secret. This breaks the trust boundary of the authentication system because predictable credentials enter the user account store. Any remote attacker who knows the hard-coded value can authenticate against accounts whose passwords were processed through this path. The exploit is public, which lowers the operational barrier for opportunistic abuse against exposed installations.

Root Cause

The root cause is improper credentials management, tracked as [CWE-255]. The reset handler embeds a static password string in its logic rather than deriving the credential from validated input, secure randomness, or an out-of-band reset token. Hard-coded credentials persist across deployments and cannot be rotated by administrators without code changes, making them a durable foothold.

Attack Vector

The attack vector is network-based with low complexity. An unauthenticated remote attacker sends a crafted HTTP request to the passsword_reset.php endpoint supplying the new_password parameter. Because the handler applies the hard-coded credential, the attacker can then authenticate to the impacted account using the known static value. No privileges and no user interaction are required, increasing the exposure of internet-facing instances.

No verified proof-of-concept code is published in vetted exploit repositories. See the VulDB entry for CVE-2026-11515 and the VulDB vulnerability record #369135 for the disclosed technical details.

Detection Methods for CVE-2026-11515

Indicators of Compromise

HTTP requests to passsword_reset.php containing the new_password parameter with the literal value password123.
Successful authentications immediately following a password reset request from an unexpected source IP.
Multiple password reset requests for different user accounts originating from the same IP within a short window.
Application database entries where stored password hashes match the hash of the string password123.

Detection Strategies

Inspect web server access logs for POST or GET requests targeting passsword_reset.php and flag those with predictable parameter values.
Correlate password reset events with subsequent login events to identify account takeover sequences.
Implement web application firewall (WAF) rules that block requests containing the known hard-coded value in the new_password field.

Monitoring Recommendations

Forward web server, PHP application, and database logs to a centralized analytics platform for query and correlation.
Alert on bursts of password reset activity, especially across multiple accounts within minutes.
Monitor authentication success rates per source IP to detect credential reuse against many accounts.

How to Mitigate CVE-2026-11515

Immediate Actions Required

Restrict external access to passsword_reset.php using network controls or authenticated reverse proxies until a patched version is deployed.
Force a password reset for every user account in the affected system using strong, unique credentials selected outside the vulnerable handler.
Audit recent password change and authentication logs for evidence of abuse and disable any suspicious accounts.
Remove or replace the hard-coded value in passsword_reset.php if local code modifications are feasible.

Patch Information

No official vendor patch is referenced in the published advisory. Administrators should consult the SourceCodester project page for updates and review the VulDB submission #836238 for additional remediation context. Until a vendor fix is available, code-level changes must enforce server-side validation of user-supplied passwords, reject default values, and implement secure password storage with per-user salts.

Workarounds

Disable the password reset endpoint in the web server configuration and require administrators to issue resets manually.
Add a WAF or reverse proxy rule that blocks requests where the new_password parameter equals password123 or other weak defaults.
Apply a password policy at the application layer that rejects known weak strings and enforces minimum length and complexity.
Place the application behind an authenticated VPN or IP allowlist to limit remote exposure.

bash

# Example Nginx rule to block requests carrying the hard-coded password value
location /passsword_reset.php {
    if ($arg_new_password = "password123") {
        return 403;
    }
    if ($request_body ~* "new_password=password123") {
        return 403;
    }
}