Qode mes Qode Membership Plugin up to 2.0.6.2 on WordPress Facebook OAuth Token Verification Guard qode_membership_login_user_from_social_network email improper authentication

Summaryinfo

A vulnerability marked as critical has been reported in Qode mes Qode Membership Plugin up to 2.0.6.2. This vulnerability affects the function qode_membership_login_user_from_social_network of the component Facebook OAuth Token Verification Guard. The manipulation of the argument email leads to improper authentication. This vulnerability is uniquely identified as CVE-2026-92885. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Qode mes Qode Membership Plugin up to 2.0.6.2. It has been rated as critical. This issue affects the function qode_membership_login_user_from_social_network of the component Facebook OAuth Token Verification Guard. The manipulation of the argument email with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Qode Membership plugin for WordPress is vulnerable to Authentication Bypass leading to Account Takeover in all versions up to, and including, 2.0.6.2 via the qode_membership_check_facebook_user AJAX action. This is due to a typographic error in the Facebook OAuth token verification guard within the qode_membership_login_user_from_social_network function — the guard condition tests an undefined variable ($check_social_useqoder instead of $check_social_user), causing empty() to always return true and rendering the Graph API token verification branch dead code, leaving wp_set_auth_cookie() reachable with no credential or token validation whatsoever. This makes it possible for unauthenticated attackers to log in as any existing WordPress account — including Administrator-level accounts — by supplying a known or enumerated administrator login name (rather than an email address) in the response[email] parameter, which the fallback path in get_user_by('login', $email) resolves to the matching account. Exploitation does require harvesting a valid qode_validate_facebook_login nonce, but this nonce is rendered on any public front-end page containing the [qode_user_login] or [qode_user_register] shortcode and is therefore obtainable without any prior authentication.

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-92885 since 09/17/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/27/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• Qode mes

Name

• Qode Membership Plugin

Version

• 2.0.6.0
• 2.0.6.1
• 2.0.6.2

CPE 2.3info

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CPE 2.2info

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