CVE-2026-18346
TikTok <= 1.4.1 - Missing Authorization to Unauthenticated TikTok Integration Takeover via 'auth_code' Parameter
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 19, 2026
- Updated
- Sep 19, 2026
- Reserved
- Jul 29, 2026
Description
The TikTok plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.4.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to overwrite the merchant's stored TikTok integration access token in wp_options, hijacking the site's TikTok Business and product catalog integration. Successful exploitation requires the attacker to supply a valid TikTok OAuth auth_code issued for the merchant's registered TikTok app, as the plugin's token exchange must receive a message='OK' response from TikTok's API before the stored access token is overwritten.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | Wordfence |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
TikToktiktokbusinessplugin |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/31233f4e-4cd5-497f-9e8a-c65635596241?source=cve
- https://plugins.trac.wordpress.org/browser/tiktok-for-business/tags/1.4.0/admin/Tt4b_Menu_Class.php#L417
- https://plugins.trac.wordpress.org/browser/tiktok-for-business/tags/1.4.0/admin/tt4b_menu.php#L13
- https://plugins.trac.wordpress.org/browser/tiktok-for-business/tags/1.4.0/admin/Tt4b_Menu_Class.php#L397
- https://plugins.trac.wordpress.org/browser/tiktok-for-business/tags/1.4.0/mapi/Tt4b_Mapi_Class.php#L332
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3699236%40tiktok-for-business&new=3699236%40tiktok-for-business
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