HIGHCVSS v3.1 8.1Vulnerability

CVE-2026-103898

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.

Properties

Severity
HIGH
Nvd fetched at
2026-10-31T12:17:39.877426+00:00
Cvss severity
HIGH
Cvss score
8.1
Retrieved at
2026-10-31T12:18:14+00:00
Score
8.1
Cvss version
3.1
Last source
NVD
Cve id
CVE-2026-103898
Cvss vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
First seen by Signal
2026-10-31T12:18:14+00:00
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published at
2026-10-31T08:16:47.460
Last modified
2026-10-31T08:16:47.460

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CVE-2026-103898 (CVSS v3.1 8.1) — Ninja Signal Threat Intelligence | Ninja Signal