CVE-2026-95527 in Conekta Payment Gateway Plugin
Summary
by MITRE • 09/23/2026
Unauthenticated Broken Access Control in Conekta Payment Gateway <= 6.2.4 versions.
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Analysis
by VulDB Data Team • 09/23/2026
The vulnerability identified as an unbroken access control issue within the Conekta payment gateway, specifically affecting versions up to and including 6.2.4, represents a critical failure in authentication mechanisms that allows unauthorized actors to interact with sensitive financial endpoints. This flaw is rooted in the application's inability to properly verify user identity or session validity before processing requests directed at administrative or internal API routes. In modern web applications, particularly those handling payment data, strict enforcement of access controls is paramount to prevent data exfiltration and fraudulent transactions. The absence of these checks means that any external entity can bypass standard login procedures and directly invoke functions intended for authenticated administrators or system processes. This type of vulnerability aligns closely with CWE-284, which describes Improper Access Control, where the software does not restrict access to resources in a way that protects against unauthorized actions.
From an operational perspective, this misconfiguration exposes the payment infrastructure to severe risks including data leakage and financial fraud. Attackers can exploit this weakness to retrieve sensitive customer information such as credit card numbers, personal identification details, and transaction histories without needing valid credentials. Furthermore, depending on the specific endpoints affected by this broken access control, adversaries may be able to modify existing orders, cancel legitimate transactions, or even initiate new fraudulent charges against unsuspecting customers. The impact extends beyond immediate financial loss; it also compromises the integrity of the payment processing system, potentially leading to regulatory non-compliance with standards such as PCI DSS, which mandates strict access controls and authentication for all systems that store, process, or transmit cardholder data.
The technical execution of this attack typically involves crafting HTTP requests to specific API endpoints that lack proper middleware validation for session tokens or API keys. By omitting these required headers or manipulating request parameters, an attacker can trick the server into treating their unauthenticated input as a legitimate administrative command. This behavior is characteristic of attacks categorized under MITRE ATT&CK technique T1078, Valid Accounts, although in this specific case, it manifests more accurately as unauthorized access due to missing authentication checks rather than credential theft. The vulnerability highlights a common development oversight where security controls are either not implemented during the coding phase or fail to be updated when new features are introduced into the payment gateway architecture.
Mitigation strategies must focus on immediate remediation of the codebase and long-term architectural improvements. For organizations running affected versions, upgrading to version 6.2.5 or later is the primary recommendation as it addresses these specific access control flaws through enhanced validation logic. In addition to patching, developers should implement robust middleware that enforces authentication checks at every entry point for sensitive operations. Utilizing established frameworks and libraries for session management can reduce the likelihood of such oversights. Furthermore, adopting a principle of least privilege ensures that even if an endpoint is accessed incorrectly, the scope of potential damage is minimized by restricting permissions to only what is strictly necessary for each user role. Regular security audits and penetration testing should be conducted to identify similar gaps in access control logic before they can be exploited in production environments.