cyberlord92 Page and Post Restriction Plugin up to 1.6.1 on WordPress REST API Authentication papr_restrict_page_post_rest_api improper authentication

Summaryinfo

A vulnerability classified as problematic was found in cyberlord92 Page and Post Restriction Plugin up to 1.6.1. Affected by this issue is the function papr_restrict_page_post_rest_api of the component REST API Authentication. The manipulation results in improper authentication. This vulnerability is identified as CVE-2026-118194. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in cyberlord92 Page and Post Restriction Plugin up to 1.6.1. It has been classified as problematic. Affected is the function papr_restrict_page_post_rest_api of the component REST API Authentication. The manipulation 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. CVE summarizes:

The Page and Post Restriction plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 1.6.1 This is due to the `papr_restrict_page_post_rest_api()` function, hooked on `rest_pre_dispatch`, re-authenticating the current user from the `wordpress_logged_in` cookie via `wp_set_current_user()` for any GET or HEAD REST request where the current user is 0, without verifying a REST nonce — silently undoing the nonce-zeroing that WordPress core's `rest_cookie_check_errors()` performs on cookie-authenticated requests that lack an `X-WP-Nonce` header or `_wpnonce` parameter. Combined with WordPress's permissive REST CORS behavior — which echoes the request `Origin` and sets `Access-Control-Allow-Credentials: true` — this allows an unauthenticated attacker to read REST API GET responses as a logged-in victim, exposing role-restricted and private post/page content, victim user profile data via `/wp-json/wp/v2/users/me`, and comments the victim is authorized to see. This requires the attacker to lure a logged-in user into visiting an attacker-controlled page that issues credentialed cross-origin `fetch` requests against the target site's REST API; no nonce or further victim interaction beyond the page visit is needed.

The advisory is available at wordfence.com. This vulnerability is traded as CVE-2026-118194 since 10/27/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/30/2026).

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• cyberlord92

Name

• Page and Post Restriction Plugin

Version

• 1.6.0
• 1.6.1

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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