CVE-2026-5459
Received Received - Intake

Insecure Direct Object Reference in User Frontend WordPress Plugin

Publication date: 2026-07-08

Last updated on: 2026-07-08

Assigner: Wordfence

Description
The User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.3.1 via the payment_page() function due to missing validation on the 'user_id' user controlled key. This makes it possible for unauthenticated attackers to activate a free subscription pack for any user on the site, overwriting their existing paid subscription and causing loss of paid features.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-07-08
Last Modified
2026-07-08
Generated
2026-07-08
AI Q&A
2026-07-08
EPSS Evaluated
N/A
NVD
CVE-2026-5459
EUVD
EUVD-2026-42229

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wp_user_frontend wp_user_frontend to 4.3.1 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability exists in the User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration plugin for WordPress, affecting all versions up to and including 4.3.1.

It is an Insecure Direct Object Reference (IDOR) vulnerability found in the payment_page() function, caused by missing validation on the 'user_id' parameter which is controlled by the user.

Because of this, unauthenticated attackers can manipulate the 'user_id' to activate a free subscription pack for any user on the site, overwriting their existing paid subscription.

This results in the loss of paid features for the affected user.

Impact Analysis

The vulnerability allows unauthenticated attackers to activate free subscription packs on behalf of any user.

This can overwrite existing paid subscriptions, causing legitimate users to lose access to paid features.

As a result, it can lead to financial loss for the site owner due to unauthorized free access and potential disruption of service for paying users.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-5459. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart