CVE-2026-81299: WP Job Portal IDOR Auth Bypass Vulnerability

CVE-2026-81299 Overview

CVE-2026-81299 is an Insecure Direct Object Reference (IDOR) vulnerability [CWE-639] affecting the WP Job Portal plugin for WordPress in versions 2.5.9 and earlier. The flaw allows authenticated users with subscriber-level privileges to access or modify objects belonging to other users by manipulating identifier parameters. Exploitation requires low privileges and no user interaction, and can be performed over the network.

Critical Impact
Authenticated subscribers can reference objects owned by other accounts, resulting in limited integrity impact against records managed by the WP Job Portal plugin.

Affected Products

WP Job Portal plugin for WordPress, versions <= 2.5.9
WordPress sites exposing subscriber registration with WP Job Portal enabled
Any site relying on WP Job Portal object identifiers for access control

Discovery Timeline

2026-08-28 - CVE-2026-81299 published to the National Vulnerability Database
2026-08-28 - Last updated in NVD database

Technical Details for CVE-2026-81299

Vulnerability Analysis

The WP Job Portal plugin exposes actions that accept object identifiers from client-supplied parameters. The plugin does not sufficiently verify that the requesting subscriber owns the referenced object before returning or modifying it. An attacker authenticated as a low-privileged subscriber can iterate identifiers and interact with data belonging to other users.

The issue is classified under CWE-639: Authorization Bypass Through User-Controlled Key. The impact scope is limited to integrity effects on records managed by the plugin; confidentiality and availability impacts are not indicated in the advisory. Further technical detail is available in the Patchstack IDOR Vulnerability Analysis.

Root Cause

The root cause is missing object-level authorization. Plugin handlers trust the identifier supplied in the request and act on the corresponding record without confirming that the current user has permission to operate on it. This is a canonical broken access control pattern in WordPress plugin code.

Attack Vector

An attacker registers or logs in as a subscriber on a WordPress site running WP Job Portal <= 2.5.9. The attacker then issues a request to a plugin endpoint while substituting the identifier parameter with a value referencing another user's object. Because the plugin does not validate ownership, the request succeeds and modifies data outside the attacker's scope.

No verified public exploit code has been released. The vulnerability mechanism is described in prose here; consult the Patchstack advisory linked above for the specific parameters and endpoints.

Detection Methods for CVE-2026-81299

Indicators of Compromise

Requests from subscriber accounts to WP Job Portal endpoints containing identifier parameters that do not correspond to objects owned by that account.
Unexpected modifications to WP Job Portal records (jobs, applications, or profiles) with an author or ownership field that does not match the acting account.
Anomalous sequential enumeration of numeric identifiers in plugin request URLs.

Detection Strategies

Enable WordPress and web server access logging, then baseline normal subscriber activity against WP Job Portal endpoints.
Alert on subscriber accounts that issue write requests targeting identifiers spanning wide numeric ranges within short time windows.
Correlate database audit events with the acting WordPress user to identify ownership mismatches.

Monitoring Recommendations

Ingest WordPress, PHP, and web server logs into a centralized analytics platform for correlation.
Monitor for new subscriber account registrations followed by immediate access to WP Job Portal endpoints.
Track plugin version inventory across managed WordPress sites to identify hosts still running <= 2.5.9.

How to Mitigate CVE-2026-81299

Immediate Actions Required

Upgrade WP Job Portal to a version later than 2.5.9 as soon as the vendor-fixed release is available.
Audit existing subscriber accounts and remove any that are unrecognized or inactive.
Review WP Job Portal records for unauthorized modifications made by subscriber accounts.

Patch Information

Refer to the Patchstack IDOR Vulnerability Analysis for the fixed version and vendor advisory information. Apply the plugin update through the WordPress admin dashboard or via WP-CLI.

Workarounds

Disable the WP Job Portal plugin until an updated version can be installed if subscriber registration cannot be restricted.
Restrict new user registration or set the default role to a value that cannot reach vulnerable endpoints.
Deploy a web application firewall rule that blocks subscriber-authenticated requests to WP Job Portal endpoints containing identifier parameters outside the user's own scope.

bash

# Update WP Job Portal using WP-CLI once a fixed version is published
wp plugin update wp-job-portal

# Verify installed version
wp plugin get wp-job-portal --field=version

# Temporarily disable the plugin if a patch is not yet available
wp plugin deactivate wp-job-portal