CVE-2025-5403: Chaitak-gorai Blogbook SQLi Vulnerability

CVE-2025-5403 Overview

CVE-2025-5403 is a SQL injection vulnerability in chaitak-gorai Blogbook, an open-source blogging application. The flaw resides in /admin/view_all_posts.php and stems from unsanitized handling of the post_id GET parameter. Attackers can manipulate this parameter to inject arbitrary SQL statements into backend database queries. The issue is remotely exploitable and requires only low-privilege authentication. Public disclosure of the exploit technique has occurred through a GitHub report. The project does not use versioning, so all releases through commit 92f5cf90f8a7e6566b576fe0952e14e1c6736513 are affected. The vendor did not respond to disclosure attempts, meaning no official patch is available at this time.

Critical Impact
Authenticated attackers can extract, modify, or delete database contents by injecting SQL through the post_id GET parameter of the Blogbook admin interface.

Affected Products

chaitak-gorai Blogbook (all releases up to commit 92f5cf90f8a7e6566b576fe0952e14e1c6736513)
Component: GET Parameter Handler in /admin/view_all_posts.php
No versioning scheme is maintained by the project

Discovery Timeline

2025-06-01 - CVE-2025-5403 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-5403

Vulnerability Analysis

CVE-2025-5403 is classified under [CWE-89] Improper Neutralization of Special Elements used in an SQL Command and [CWE-74] Improper Neutralization of Special Elements in Output. The affected script /admin/view_all_posts.php accepts the post_id value from the query string and incorporates it into a SQL statement without parameterization or input sanitization. Attackers who reach the admin interface with low-privilege credentials can inject SQL clauses that alter query logic. Successful exploitation permits reading arbitrary rows, modifying records, or dropping tables depending on database privileges. The attack is remote and requires no user interaction.

Root Cause

The root cause is direct concatenation of untrusted GET input into a SQL query. The application does not use prepared statements or bound parameters when processing post_id. Server-side input validation is either missing or insufficient to neutralize SQL metacharacters such as single quotes, semicolons, and comment sequences. See the GitHub SQL Injection Report for reproduction details.

Attack Vector

The attack vector is network-based. An authenticated user with access to the admin routes issues a crafted HTTP GET request to /admin/view_all_posts.php with a malicious post_id value. Because the injected payload becomes part of the executed SQL statement, the attacker can pivot to UNION-based data extraction, boolean-based blind extraction, or destructive statements. See the VulDB entry #310743 for additional advisory context.

Detection Methods for CVE-2025-5403

Indicators of Compromise

HTTP requests to /admin/view_all_posts.php containing SQL metacharacters (', --, ;, UNION, SELECT) in the post_id parameter.
Anomalous or long-running database queries originating from the Blogbook application user.
Unexpected read access to sensitive tables such as users or credential stores.
Web server logs showing repeated requests with incrementing or encoded post_id payloads consistent with automated SQLi tooling.

Detection Strategies

Deploy web application firewall signatures that flag SQL injection patterns targeting post_id GET parameters.
Enable database query auditing to capture syntactically malformed or high-volume queries from the Blogbook service account.
Correlate web access logs with database logs to identify request-to-query mappings that include unbounded string concatenation artifacts.

Monitoring Recommendations

Alert on any 4xx and 5xx responses from /admin/view_all_posts.php paired with encoded SQL keywords in the query string.
Monitor for outbound data volume spikes from the database host that could indicate bulk extraction.
Track authentication events preceding suspicious admin requests to identify compromised low-privilege accounts.

How to Mitigate CVE-2025-5403

Immediate Actions Required

Restrict network access to the Blogbook admin path using IP allowlisting or VPN gating until a fix is applied.
Review admin account rosters and rotate credentials for any accounts with access to /admin/.
Deploy WAF rules that block SQL metacharacters in the post_id parameter of view_all_posts.php.
Audit database logs for evidence of prior exploitation attempts against the vulnerable endpoint.

Patch Information

No official vendor patch is available. The vendor was contacted before public disclosure but did not respond, and the project does not maintain versioned releases. Organizations running Blogbook should apply a source-level fix by replacing string concatenation in /admin/view_all_posts.php with prepared statements using PDO or MySQLi parameter binding. Cast post_id to an integer before use if the value is expected to be numeric. Refer to the GitHub SQL Injection Report and VulDB advisory for technical remediation guidance.

Workarounds

Cast the post_id value to an integer server-side using (int)$_GET['post_id'] before including it in any query.
Migrate all queries in view_all_posts.php to parameterized prepared statements.
Apply the principle of least privilege to the database account used by Blogbook, removing DROP, ALTER, and multi-statement permissions.
Consider retiring the application if unmaintained and migrate content to an actively supported blogging platform.

bash

# Example hardening: enforce integer casting and parameterized query in PHP
# Replace vulnerable pattern with prepared statement
$post_id = (int) $_GET['post_id'];
$stmt = $pdo->prepare('SELECT * FROM posts WHERE id = :id');
$stmt->execute([':id' => $post_id]);
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);