Helpfulcrowd Product Reviews <= 1.2.9 - Inccorect Authorization via Type Juggling in 'token' Parameter to Arbitrary Settings Update
| CVE | CVE-2026-8499 |
|---|---|
| CVSS | 5.3 (Medium) |
| Publicly Published | June 8, 2026 |
| Last Updated | July 9, 2026 |
| Researcher |
Legion Hunter
|
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.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for Helpfulcrowd Product Reviews
| Software Type | Plugin |
|---|---|
| Software Slug | helpfulcrowd-product-reviews (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 1.3.0, or a newer patched version |
| Affected Version |
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| Patched Version |
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