CVE-2026-79322: Mageplaza Blog SQL Injection Vulnerability

CVE-2026-79322 Overview

CVE-2026-79322 is a SQL injection vulnerability in the RelatedProduct block of the Mageplaza Blog extension for Magento 2 (mageplaza/magento-2-blog-extension) through version 4.3.2. Remote unauthenticated attackers can execute arbitrary SQL commands by supplying a crafted id parameter to the /mpblog/post/view endpoint. Successful exploitation allows attackers to read arbitrary database contents, including customer records, order data, and administrative credentials stored by the Magento installation.

Critical Impact
Unauthenticated remote attackers can extract arbitrary data from the Magento database through the vulnerable id parameter, exposing customer PII, session data, and administrative credential hashes.

Affected Products

Mageplaza Blog for Magento 2 (mageplaza/magento-2-blog-extension) versions up to and including 4.3.2
Magento 2 storefronts with the Mageplaza Blog module installed and enabled
Any deployment exposing the /mpblog/post/view route to untrusted networks

Discovery Timeline

2026-09-09 - CVE-2026-79322 published to the National Vulnerability Database
2026-09-09 - Last updated in NVD database

Technical Details for CVE-2026-79322

Vulnerability Analysis

The flaw is classified as an SQL Injection weakness [CWE-89] affecting the RelatedProduct block rendered by the Mageplaza Blog module. The id parameter accepted by /mpblog/post/view is concatenated into a database query without parameterization or sufficient sanitization. Because the endpoint serves the public storefront, no authentication or user interaction is required to reach the vulnerable code path.

An attacker can leverage classical union-based, boolean-based, or time-based SQL injection techniques to enumerate schema information and exfiltrate row-level data. Impact extends beyond the blog tables because the Magento database typically contains customer accounts, orders, admin users, and API tokens within the same schema.

Root Cause

The root cause is the direct inclusion of an untrusted request parameter into a SQL statement inside the RelatedProduct block logic. Magento's ORM (Magento\Framework\DB) supports bound parameters and query builders, but the affected code path constructs the query as a string containing the raw id value. This bypasses the framework's prepared statement protections and exposes the underlying MySQL/MariaDB backend to injection.

Attack Vector

Exploitation is performed over the network by issuing an HTTP GET request to /mpblog/post/view with a malicious id parameter. The endpoint is reachable to any anonymous visitor of the storefront. A proof of concept is published in the referenced GitHub Gist PoC Code, and the vulnerable source is available in the GitHub Magento 2 Blog Repo.

The vulnerability manifests when the id parameter is passed to the related product lookup and appended to a SQL WHERE clause. See the referenced PoC for technical details of the injection payload.

Detection Methods for CVE-2026-79322

Indicators of Compromise

Web server access logs containing requests to /mpblog/post/view with id parameter values that include SQL metacharacters such as single quotes, UNION SELECT, SLEEP(, INFORMATION_SCHEMA, or comment sequences (--, #, /*).
Anomalously long or URL-encoded id parameter values on the mpblog route.
Database error responses (HTTP 500) originating from mpblog/post/view requests.
Unusual outbound traffic from the Magento application server following suspicious mpblog requests, indicating potential data exfiltration.

Detection Strategies

Deploy Web Application Firewall (WAF) rules that inspect the id query parameter on /mpblog/post/view for SQL injection patterns and reject non-numeric values.
Enable MySQL general query logging temporarily and alert on queries referencing mageplaza_blog_post tables that contain injected clauses such as UNION or SLEEP.
Correlate storefront request patterns against a baseline; a single client generating high volumes of mpblog/post/view requests with varying id values indicates automated exploitation.

Monitoring Recommendations

Forward web server, WAF, and database logs to a centralized analytics platform and build alerts for SQL injection signatures on the affected route.
Monitor for new admin user creation, unexpected admin_user table reads, and API token generation events in Magento audit logs.
Track authentication anomalies for administrator accounts, since extracted password hashes may be cracked offline and reused.

How to Mitigate CVE-2026-79322

Immediate Actions Required

Inventory all Magento 2 deployments and identify installations of the mageplaza/magento-2-blog-extension module at or below version 4.3.2.
Restrict or disable the /mpblog/post/view route at the reverse proxy or WAF until an upstream patch is applied.
Rotate Magento administrator credentials, API integration tokens, and customer session secrets on any affected store.
Review database and web logs for prior exploitation attempts and preserve evidence for incident response.

Patch Information

No vendor advisory URL is listed in the NVD record at publication time. Administrators should monitor the GitHub Magento 2 Blog Repo for a fixed release beyond 4.3.2 and apply it as soon as it becomes available. Until an official patch ships, apply the compensating controls below.

Workarounds

Add a WAF rule to enforce that the id parameter on /mpblog/post/view matches a strict numeric regex (for example ^[0-9]+$) and drop all other requests.
Temporarily disable the Mageplaza Blog module using bin/magento module:disable Mageplaza_Blog and clear the cache if the blog feature is not business-critical.
Apply database-level least privilege so the Magento application user cannot read tables outside the storefront schema, limiting the blast radius of any successful injection.

bash

# Configuration example: disable the vulnerable module and enforce input validation
bin/magento module:disable Mageplaza_Blog
bin/magento cache:flush

# Example NGINX location block to filter non-numeric id values
location /mpblog/post/view {
    if ($arg_id !~ ^[0-9]+$) { return 400; }
    proxy_pass http://magento_upstream;
}