EUVD-2026-51789
GHSA-75h6-5h53-j8cq
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Remote, unauthenticated, no interaction, deterministic nonce bypass (AC:L), and admin password reset yields full C/I/A compromise.
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
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.
Articles & Coverage 1
AnalysisAI
Authentication bypass in the Single Sign On For TNG WordPress plugin (all versions through 2.0.0) lets unauthenticated attackers reset the password of any account, including administrators, resulting in full site takeover. The ssoprocess_ajax() handler is exposed via wp_ajax_nopriv_ and performs a password reset on any email-identified account with no ownership token or capability check, guarded only by a nonce that the plugin itself publicly broadcasts to logged-out visitors. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The site must have the Single Sign On For TNG plugin (version ≤ 2.0.0) installed and active, exposing the `wp_ajax_nopriv_ssoprocess_ajax` handler. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority issue, not an inflated CVSS. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker loads the target site's homepage, scrapes the valid `ssoajaxnonce` from the `SSOPWDREQUIREMENT` JavaScript object, then sends a single crafted POST to `admin-ajax.php` with `action=ssoprocess_ajax`, the `setnewpassword` operation, the administrator's email, and a chosen new password. WordPress resets the admin's credentials, and the attacker logs in with full control. … |
| Remediation | No fixed plugin version is stated in the provided data; a WordPress.org SVN changeset (revision 3624827, https://plugins.trac.wordpress.org/changeset?reponame=&old=3624827%40single-sign-on-for-tng&new=3624827%40single-sign-on-for-tng) indicates an upstream code change exists, but a released patched version is not independently confirmed, so treat this as an upstream fix without a verified tagged release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all WordPress instances running Single Sign On For TNG plugin through version 2.0.0 and deactivate the plugin immediately to block exploitation. …
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External POC / Exploit Code
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