CVE-2026-42684: WP Job Portal SQL Injection Vulnerability

CVE-2026-42684 Overview

CVE-2026-42684 is a blind SQL injection vulnerability in the Ahmad WP Job Portal plugin for WordPress. The flaw stems from improper neutralization of special elements used in an SQL command [CWE-89]. Unauthenticated attackers can inject crafted SQL fragments into vulnerable parameters, forcing the database to execute attacker-controlled queries. The issue affects all WP Job Portal versions from n/a through 2.5.1. The vulnerability carries a CVSS 3.1 score of 9.3 with network attack vector, no privileges required, and no user interaction. Because the injection is blind, attackers infer query results through conditional response differences or timing, enabling silent extraction of WordPress database contents.

Critical Impact
Unauthenticated remote attackers can execute arbitrary SQL queries against the WordPress database, exposing user credentials, session tokens, and application data.

Affected Products

WP Job Portal plugin for WordPress
All versions up to and including 2.5.1
WordPress sites running the Ahmad WP Job Portal extension

Discovery Timeline

2026-06-02 - CVE-2026-42684 published to NVD
2026-06-02 - Last updated in NVD database

Technical Details for CVE-2026-42684

Vulnerability Analysis

The WP Job Portal plugin fails to sanitize user-supplied input before incorporating it into SQL statements. The vulnerability is classified as a blind SQL injection, meaning the application does not return query results directly in HTTP responses. Attackers instead extract data by observing boolean conditions or response timing differences across crafted payloads.

The scope-changed impact indicates that successful exploitation affects resources beyond the vulnerable component. An attacker reaching the database layer can read WordPress core tables including wp_users and wp_usermeta, exposing password hashes and session metadata. The plugin operates within the WordPress request context, so injection points are reachable through standard HTTP endpoints exposed by the plugin.

Root Cause

The root cause is the construction of SQL queries through string concatenation or interpolation of unsanitized HTTP parameters. The plugin does not use WordPress prepared statement helpers such as $wpdb->prepare() with proper placeholders. Special characters including single quotes, comments, and UNION keywords pass through to the SQL engine unchanged.

Attack Vector

Exploitation requires only network access to the WordPress site and no authentication. An attacker sends an HTTP request to a vulnerable WP Job Portal endpoint with SQL metacharacters embedded in a parameter. Typical blind SQL injection payloads use boolean conditions such as AND 1=1 versus AND 1=2, or time-based delays through SLEEP() to confirm injection and extract data character by character. Refer to the Patchstack SQL Injection Analysis for detailed technical context.

Detection Methods for CVE-2026-42684

Indicators of Compromise

HTTP requests to WP Job Portal endpoints containing SQL metacharacters such as ', --, UNION SELECT, or SLEEP(
Unexpected long response times from /wp-admin/admin-ajax.php or plugin-specific routes, suggesting time-based blind injection
Spikes in repeated requests to the same plugin endpoint with incrementing payload values, indicating automated data extraction
Database error fragments in web server logs referencing MySQL syntax errors near plugin queries

Detection Strategies

Inspect web server and WordPress access logs for query strings containing encoded SQL keywords targeting WP Job Portal URLs
Deploy a web application firewall ruleset matching SQL injection patterns specific to the plugin's parameter names
Enable MySQL general or slow query logging and review queries containing concatenated user input from plugin handlers

Monitoring Recommendations

Alert on bursts of plugin requests from a single IP within short time windows
Monitor for unusual SELECT statements against wp_users or wp_options originating from the plugin context
Track outbound database response time anomalies that correlate with time-based blind SQL injection probes

How to Mitigate CVE-2026-42684

Immediate Actions Required

Update WP Job Portal to a version newer than 2.5.1 once the vendor publishes a fixed release
Disable or remove the WP Job Portal plugin if a patched version is not yet available
Rotate WordPress administrator passwords and invalidate active sessions if exploitation indicators are present
Audit the database for unauthorized users, modified posts, or injected options entries

Patch Information

The vulnerability affects WP Job Portal through version 2.5.1. Consult the Patchstack advisory for the current fixed version and apply the update through the WordPress plugin manager.

Workarounds

Deploy a web application firewall rule that blocks SQL metacharacters in parameters sent to WP Job Portal endpoints
Restrict access to WP Job Portal URLs by IP allowlisting where the plugin is used for internal hiring workflows
Apply virtual patching through Patchstack or equivalent WordPress security platforms until the official update is installed

bash

# Example ModSecurity rule blocking SQL keywords in WP Job Portal requests
SecRule REQUEST_URI "@contains /wp-job-portal" \
  "chain,deny,status:403,id:1042684,msg:'CVE-2026-42684 SQLi attempt'"
  SecRule ARGS "@rx (?i)(union\s+select|sleep\(|benchmark\(|--|/\*)" "t:none"