britcoder Single Sign On for TNG Plugin up to 2.0.0 on WordPress ssoprocess_ajax email improper authentication

Summaryinfo

A vulnerability marked as critical has been reported in britcoder Single Sign On for TNG Plugin up to 2.0.0. This issue affects the function ssoprocess_ajax. The manipulation of the argument email leads to improper authentication. This vulnerability is referenced as CVE-2026-15964. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in britcoder Single Sign On for TNG Plugin up to 2.0.0. It has been rated as critical. This issue affects the function ssoprocess_ajax. 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 Single Sign On For TNG plugin for WordPress is vulnerable to Authentication Bypass via unauthenticated password reset in all versions up to, and including, 2.0.0. This is due to the `ssoprocess_ajax()` function — registered on `wp_ajax_nopriv_ssoprocess_ajax` and therefore reachable without authentication — accepting an attacker-supplied `email` parameter with the `setnewpassword` operation and calling `reset_password()` on the resolved account without any ownership token, email confirmation link, or capability check. The sole guard is a call to `check_ajax_referer()`, which provides no authorization barrier because the `ssoajaxnonce` nonce is publicly broadcast on every front-end page via `wp_localize_script()` into the `SSOPWDREQUIREMENT` JavaScript object; since WordPress computes nonces for logged-out visitors against a shared anonymous session context, any unauthenticated visitor can scrape a valid nonce from the homepage and use it to authenticate the request. This makes it possible for unauthenticated attackers to change the password of any WordPress account, including administrator accounts, enabling complete site takeover.

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-15964 since 07/16/2026. 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 08/01/2026).

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

• britcoder

Name

• Single Sign On for TNG Plugin

Version

• 2.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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