CVE-2025-52726: Incorrect Privilege Assignment Vulnerability in pebas CouponXxL Custom Post Types

Overview

This blog post will delve into the details of the security vulnerability identified as CVE-2025-52726. This vulnerability results from an incorrect privilege assignment within the pebas CouponXxL Custom Post Types, which in turn allows for privilege escalation. The individuals most affected by this vulnerability are users of the CouponXxL Custom Post Types from version n/a through 3.0. The existence of this vulnerability can potentially lead to severe consequences such as system compromise or data leakage, hence the need for awareness and a swift response.

Vulnerability Summary

CVE ID: CVE-2025-52726
Severity: High (8.6 CVSS Severity Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

pebas CouponXxL Custom Post Types| n/a through 3.0

How the Exploit Works

The CVE-2025-52726 vulnerability arises from an incorrect privilege assignment within the pebas CouponXxL Custom Post Types. Essentially, the software does not properly restrict access to certain functionalities, hence a low privileged user can gain elevated privileges. The attacker can exploit this lapse to perform actions with escalated privileges, which could potentially lead to system compromise or data leakage.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited. In this scenario, the attacker sends a specially crafted HTTP request to the target system, which results in privilege escalation.

POST /pebas_couponxxl/escalate_privilege HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "user_status": "admin" }

In this example, the attacker manipulates the “user_status” field to “admin”, thereby granting themselves admin privileges.

Mitigation Guidance

To mitigate this vulnerability, users are advised to apply the vendor patch as soon as possible. In the interim, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation. These systems can potentially detect and block attempts to exploit this vulnerability, hence providing a temporary layer of security while the patch is being applied.