FindAll Membership Plugin up to 1.0.4 on WordPress Social Login findall_membership_check_google_user improper authentication

Summaryinfo

A vulnerability marked as critical has been reported in FindAll Membership Plugin up to 1.0.4 on WordPress. This impacts the function findall_membership_check_google_user of the component Social Login. The manipulation leads to improper authentication. This vulnerability is uniquely identified as CVE-2025-13539. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in FindAll Membership Plugin up to 1.0.4 on WordPress and classified as critical. This issue affects the function findall_membership_check_google_user of the component Social Login. The manipulation 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 FindAll Membership plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 1.0.4. This is due to the plugin not properly logging in a user with the data that was previously verified through the 'findall_membership_check_facebook_user' and the 'findall_membership_check_google_user' functions. This makes it possible for unauthenticated attackers to log in as administrative users, as long as they have an existing account on the site which can easily be created by default through the temp user functionality, and access to the administrative user's email.

The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2025-13539. 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 are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/29/2025).

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-199796). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Name

• FindAll Membership Plugin

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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