CVE-2025-5566: PHPGurukul Notice Board System SQLi Flaw

CVE-2025-5566 Overview

CVE-2025-5566 is a SQL injection vulnerability in PHPGurukul Notice Board System 1.0. The flaw exists in /search-notice.php, where the searchdata parameter is passed directly to the database query without proper sanitization. Attackers can manipulate this argument to inject arbitrary SQL statements. The vulnerability is exploitable remotely and requires low privileges with no user interaction.

The issue is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component). Public disclosure has occurred, and proof-of-concept information is available through VulDB and GitHub issue trackers.

Critical Impact
Remote attackers with low-privilege access can extract, modify, or delete database contents through SQL injection against the searchdata parameter in /search-notice.php.

Affected Products

PHPGurukul Notice Board System 1.0
Component: /search-notice.php
Parameter: searchdata

Discovery Timeline

2025-06-04 - CVE-2025-5566 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-5566

Vulnerability Analysis

The vulnerability resides in the search functionality of PHPGurukul Notice Board System 1.0. The /search-notice.php script accepts user-supplied input through the searchdata parameter and concatenates it into a SQL query string. Because the application does not use parameterized queries or input sanitization, an attacker can append SQL syntax that the database engine will execute.

This class of flaw allows attackers to read sensitive data, bypass authentication, modify records, or in some database configurations execute operating system commands. The EPSS data indicates a probability of 0.318% for near-term exploitation activity.

Root Cause

The root cause is improper neutralization of special characters used in SQL statements. The searchdata argument flows from the HTTP request directly into a SQL query without prepared statements, parameter binding, or escape routines. Any single quote, semicolon, or SQL keyword in the input becomes part of the executed statement.

Attack Vector

An attacker sends a crafted HTTP request to /search-notice.php with malicious SQL payloads in the searchdata parameter. The attack requires network access to the application and authenticated low-privilege credentials. No user interaction is needed. Typical payloads include UNION-based queries to extract data from other tables, boolean-based blind injection to enumerate schema, and time-based techniques to confirm injection points.

The vulnerability mechanism follows a standard pattern: untrusted input is interpolated into a SQL string and executed by the backend MySQL database. Refer to the GitHub Issue Discussion and VulDB #311013 for technical details and exploitation evidence.

Detection Methods for CVE-2025-5566

Indicators of Compromise

HTTP requests to /search-notice.php containing SQL metacharacters such as ', --, UNION, SELECT, or SLEEP( in the searchdata parameter
Unexpected database errors logged by the application referencing the search functionality
Anomalous outbound queries from the web server to internal database tables not normally accessed by the search feature
Web server access logs showing repeated requests to /search-notice.php from a single source within short intervals

Detection Strategies

Deploy web application firewall (WAF) rules to inspect query strings and POST bodies targeting /search-notice.php for SQL injection patterns
Enable MySQL general query logging and alert on queries originating from the notice board application containing tautologies (OR 1=1), UNION SELECT, or INFORMATION_SCHEMA access
Correlate web access logs with database audit logs to identify mismatches between expected and observed query shapes

Monitoring Recommendations

Monitor authentication logs for accounts performing search operations at higher rates than baseline
Track HTTP 500 responses from /search-notice.php, which often indicate SQL syntax errors during injection probing
Alert on database response sizes from search queries that exceed normal thresholds, suggesting data exfiltration

How to Mitigate CVE-2025-5566

Immediate Actions Required

Restrict access to the PHPGurukul Notice Board System to trusted networks until a vendor patch becomes available
Deploy a WAF with SQL injection signatures in front of the application and block requests containing SQL metacharacters in searchdata
Rotate database credentials used by the application and audit existing accounts for unauthorized changes
Review web server and database logs for prior exploitation attempts targeting /search-notice.php

Patch Information

No vendor patch is currently listed in the available references. Administrators should monitor the PHP Gurukul Resource for updates. Until an official fix is published, apply the workarounds below.

Workarounds

Modify /search-notice.php to use prepared statements with mysqli or PDO parameter binding instead of string concatenation
Apply server-side input validation that rejects non-alphanumeric characters in the searchdata parameter
Run the application database account with least-privilege permissions, removing FILE, DROP, and administrative grants
Consider replacing the affected installation with an alternative notice board solution if no vendor fix is forthcoming

bash

# Example PDO-based fix pattern for search-notice.php
# Replace vulnerable concatenation with prepared statement:
# $sql = "SELECT * FROM notices WHERE title LIKE :search";
# $stmt = $pdo->prepare($sql);
# $stmt->execute([':search' => '%' . $searchdata . '%']);