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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-8499 Detail

Description

The Helpfulcrowd Product Reviews plugin for WordPress is vulnerable to Authorization Bypass via PHP Type Juggling in versions up to, and including, 1.2.9. This is due to the `helpfulcrowd_validate_token()` function using a loose comparison operator (`!=`) instead of a strict comparison (`!==`) when validating the `token` parameter, while the corresponding REST route `/wp-json/helpfulcrowd/v1/update-settings` is registered with a `permission_callback` of `__return_true`, making it reachable by unauthenticated users; submitting a JSON boolean `true` as the `token` value causes PHP's loose comparison to evaluate as equal to the non-empty base64-encoded secret string, bypassing the check entirely. This makes it possible for unauthenticated attackers to invoke `helpfulcrowd_settings_endpoint()` and write arbitrary attacker-controlled key-value pairs directly into the `helpfulcrowd_options` WordPress database option via `update_option()` without any sanitization or allowlist filtering, enabling full unauthenticated modification of the plugin's stored configuration.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://plugins.trac.wordpress.org/browser/helpfulcrowd-product-reviews/tags/1.2.9/includes/HelpfulcrowdCustomEndpoints.php#L13 Wordfence
https://plugins.trac.wordpress.org/browser/helpfulcrowd-product-reviews/tags/1.2.9/includes/HelpfulcrowdCustomEndpoints.php#L71 Wordfence
https://plugins.trac.wordpress.org/browser/helpfulcrowd-product-reviews/tags/1.2.9/includes/core.php#L122 Wordfence
https://www.wordfence.com/threat-intel/vulnerabilities/id/26f34aa0-8584-4156-b084-d34a0ab0a997?source=cve Wordfence

Weakness Enumeration

CWE-ID CWE Name Source
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion') Wordfence  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-8499
NVD Published Date:
06/09/2026
NVD Last Modified:
06/09/2026
Source:
Wordfence