8.1
HIGH CVSS 3.1
CVE-2026-103898
Wp Social Login and Register Social Counter <= 3.2.2 - Unauthenticated Authentication Bypass via Insufficient Email Verification in Social Login Callback
Description

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.

INFO

Published Date :

Oct. 31, 2026, 8:16 a.m.

Last Modified :

Oct. 31, 2026, 8:16 a.m.

Remotely Exploit :

Yes !
Affected Products

The following products are affected by CVE-2026-103898 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Wpmet wp_social_login_and_register_social_counter
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH MITRE-CVE
CVSS 3.1 HIGH [email protected]
Solution
Update the Wp Social Login and Register Social Counter plugin to a version that addresses the authentication bypass vulnerability.
  • Update the Wp Social Login and Register Social Counter plugin.
  • Verify plugin settings for proper email verification.
  • Remove or disable the plugin if no update is available.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-103898 is associated with the following CWEs:

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-103898 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2026-103898 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by [email protected]

    Oct. 31, 2026

    Action Type Old Value New Value
    Added Description 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.
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-287
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/103xxx/CVE-2026-103898.json">CVE-2026-103898</a>
    Added Reference https://plugins.trac.wordpress.org/browser/wp-social/tags/3.2.1/inc/admin-create-user.php#L172
    Added Reference https://plugins.trac.wordpress.org/browser/wp-social/tags/3.2.1/inc/admin-create-user.php#L229
    Added Reference https://plugins.trac.wordpress.org/browser/wp-social/tags/3.2.1/inc/admin-create-user.php#L512
    Added Reference https://plugins.trac.wordpress.org/browser/wp-social/tags/3.2.1/inc/admin-rest-api.php#L46
    Added Reference https://plugins.trac.wordpress.org/browser/wp-social/tags/3.2.1/lib/composer/vendor/hybridauth/hybridauth/src/Provider/Facebook.php#L205
    Added Reference https://plugins.trac.wordpress.org/browser/wp-social/tags/3.2.1/lib/composer/vendor/hybridauth/hybridauth/src/Provider/Twitter.php#L102
    Added Reference https://plugins.trac.wordpress.org/changeset?reponame=&old=3752566%40wp-social&new=3752566%40wp-social
    Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/e961d3db-da5e-4bde-ae7e-04e6ba3ebef4?source=cve
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.