roxnor Wp Social Login and Register Social Counter Plugin REST Callback admin-create-user.php wp_set_auth_cookie improper authentication

Summaryinfo

A vulnerability labeled as critical has been found in roxnor Wp Social Login and Register Social Counter Plugin up to 3.2.2. Affected is the function wp_set_auth_cookie of the file inc/admin-create-user.php of the component REST Callback Handler. The manipulation of the argument email results in improper authentication. This vulnerability is identified as CVE-2026-103898. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in roxnor Wp Social Login and Register Social Counter Plugin up to 3.2.2. Affected is the function wp_set_auth_cookie of the file inc/admin-create-user.php of the component REST Callback Handler. The manipulation of the argument email with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The Wp Social Login and Register Social Counter plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 3.2.2. This is due to the social login REST callback registered at `/wp-json/wslu-social-login/type/{provider}/` with `permission_callback => __return_true` locating an existing WordPress account solely by the email string returned from the OAuth provider and calling `wp_set_auth_cookie()` without a password check, while the only verification guard — `!empty($getProfile->emailVerified)` in `inc/admin-create-user.php` — is a no-op for the bundled Hybridauth Facebook and Twitter adapters, both of which assign the raw email string rather than a boolean verified flag to `emailVerified`. This makes it possible for unauthenticated attackers to obtain a fully authenticated session as any existing WordPress user, including Administrators, whose registered email address can be presented through a configured Facebook or Twitter login on the target site. Exploitation requires only that the attacker control an OAuth account whose provider-returned email matches the target account's registered WordPress email address; no local credentials, nonce, or prior foothold is needed.

The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-103898 since 10/01/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/31/2026).

By approaching the search of inurl:inc/admin-create-user.php it is possible to find vulnerable targets with Google Hacking.

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• roxnor

Name

• Wp Social Login and Register Social Counter Plugin

Version

• 3.2.0
• 3.2.1
• 3.2.2

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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