CVE-2026-116855 in My auctions allegro Plugin
Summary
by MITRE • 10/28/2026
Missing Authorization vulnerability in wphocus My auctions allegro my-auctions-allegro-free-edition allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects My auctions allegro: from n/a through 4.0.3.
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Analysis
by VulDB Data Team • 10/28/2026
The identified security flaw represents a critical failure in access control mechanisms within the wphocus plugin for WordPress, specifically affecting versions of the Allegro my-auctions extension ranging from its initial release up to version 4.0.3. This vulnerability is classified as an insecure direct object reference or broken access control issue, where the application fails to properly verify whether a user has the necessary permissions to perform specific actions on auction data associated with their account. In a typical WordPress environment, plugins often handle sensitive e-commerce operations such as bid placement, listing management, and payment processing. When authorization checks are missing or incorrectly configured, an attacker can manipulate HTTP requests to interact with resources belonging to other users or administrative functions that should be restricted. This type of flaw allows for unauthorized access to private auction details, potential manipulation of bidding processes, and in severe cases, complete compromise of the e-commerce integrity hosted on the platform.
From a technical perspective, this vulnerability stems from the application's reliance on client-side trust or insufficient server-side validation when processing requests related to Allegro auctions. The system likely accepts parameters such as auction IDs or user identifiers without verifying that these resources are legitimately owned by the authenticated session making the request. Consequently, an attacker can utilize tools like Burp Suite or custom scripts to modify request payloads, changing target object references to those of other users. This exploitation path does not require authentication for all actions if administrative endpoints are also affected, but even with valid credentials, a malicious user could escalate privileges or access data outside their scope. The absence of robust session management and role-based access control checks creates an environment where the principle of least privilege is violated, allowing lateral movement within the application's functional boundaries.
The operational impact of this vulnerability extends beyond simple data leakage to include significant business disruption and financial risk for merchants using the Allegro integration. Unauthorized users could view confidential sales data, customer information, or pricing strategies, leading to competitive intelligence theft and privacy violations under regulations such as GDPR. More critically, if the flaw allows modification of auction states or bid submissions, it undermines trust in the marketplace integrity. Attackers might engage in sniping bids artificially, canceling legitimate transactions, or altering listing statuses to disrupt sales operations. For administrators, this could mean unauthorized changes to plugin settings or user roles, potentially leading to full site compromise if combined with other vulnerabilities like cross-site scripting or SQL injection that often accompany access control flaws. The cumulative effect is a degradation of service reliability and potential legal liabilities due to data breaches.
To mitigate these risks, immediate remediation involves upgrading the wphocus Allegro my-auctions plugin to version 4.0.3 or later, where developers have presumably implemented stricter authorization checks. In addition to updating software, administrators should enforce strict input validation on all endpoints handling auction-related operations and ensure that server-side logic explicitly verifies user ownership of requested resources before processing any changes. Implementing multi-factor authentication for administrative accounts adds a layer of defense against credential-based attacks that might exploit these access control weaknesses. Furthermore, deploying a Web Application Firewall can help detect and block anomalous request patterns indicative of unauthorized object reference manipulation. Regular security audits and penetration testing focused on role-based access controls are essential to identify similar misconfigurations in other plugins or custom code within the WordPress ecosystem, ensuring comprehensive protection against broken access control vulnerabilities aligned with CWE-284 standards.