CVE-2026-62022 in Tonda Membership Plugin
Summary
by MITRE • 10/10/2026
Unauthenticated Privilege Escalation in Tonda Membership <= 1.0.1 versions.
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Analysis
by VulDB Data Team • 10/10/2026
The vulnerability identified as an unauthenticated privilege escalation within the Tonda Membership plugin, specifically affecting versions up to and including 1.0.1, represents a critical security flaw that allows attackers to gain elevated access rights without valid credentials. This type of weakness fundamentally undermines the core principle of authentication by bypassing identity verification mechanisms entirely. In typical web application architectures, privilege escalation occurs when an actor with lower-level permissions exploits logic errors or misconfigurations to assume higher privileges, such as administrative control. However, in this specific instance, the attack vector is unauthenticated, meaning that no prior login session or valid user token is required to initiate the exploit. This significantly lowers the barrier for entry, enabling any remote attacker on the network to potentially compromise the integrity and confidentiality of the system hosting the WordPress plugin.
From a technical perspective, such vulnerabilities often stem from improper access control checks within the application's backend logic. The flaw likely resides in an endpoint or function that processes user input without adequately verifying whether the requester possesses the necessary administrative privileges before executing sensitive operations. This could involve manipulating parameters passed via HTTP requests to trigger actions reserved for administrators, such as modifying plugin settings, creating new admin users, or altering database structures. Because the check is either missing or flawed, the application treats unauthenticated requests with the same trust level as authenticated administrator requests. This misconfiguration aligns closely with CWE-269, which classifies Improper Privilege Management, and more specifically points toward issues where access control decisions are not enforced at critical junctures in the code execution flow.
The operational impact of this vulnerability is severe for any website relying on Tonda Membership to manage user roles or subscription tiers. An attacker who successfully exploits this flaw can achieve full administrative control over the WordPress installation. This level of access allows the adversary to install malicious plugins, inject backdoors into theme files, exfiltrate sensitive database contents including user credentials and personal data, and deface the website. Furthermore, because Tonda Membership handles membership logic, compromising it may also allow attackers to manipulate subscription statuses for other users, potentially granting free access to premium content or disrupting service availability. The ability to escalate privileges without authentication makes this a high-severity issue that can lead to complete system compromise within minutes of discovery by malicious actors scanning the internet.
In terms of threat modeling and industry frameworks, this vulnerability maps directly to MITRE ATT&CK technique T1078, specifically Valid Accounts or Initial Access via Unauthenticated Exploitation depending on how the escalation is leveraged for persistence. It also relates to CWE-284 Improper Access Control, as the system fails to restrict access to resources based on user roles. The lack of authentication requirement places this in a category of vulnerabilities that are frequently targeted by automated bots and scanners looking for easy wins against WordPress sites. Organizations running affected versions must recognize that this is not merely a configuration error but a fundamental failure in security architecture where trust boundaries are ignored.
To mitigate the risks associated with Tonda Membership version 1.0.1 and earlier, immediate action is required to update the plugin to the latest patched version released by the vendor. Developers should verify that all access control checks are implemented using robust frameworks provided by WordPress core functions such as current_user_can or capability-based role verification before executing any administrative logic. For administrators unable to patch immediately due to compatibility concerns, temporary mitigation strategies include restricting access to wp-admin directories via IP whitelisting if feasible, although this is not a complete solution for unauthenticated API endpoints that may be exposed publicly. It is also advisable to audit the site's file permissions and monitor logs for unusual activity indicative of privilege escalation attempts, such as repeated failed login attempts followed by successful administrative actions from new or unknown user accounts. Regular security audits and adherence to secure coding standards are essential to prevent similar flaws in future development cycles.