CVE-2026-18346 json
TikTok <= 1.4.1 - Missing Authorization to Unauthenticated TikTok Integration Takeover via 'auth_code' Parameter
published 2026-09-19 50 d ago modified 2026-09-21 48 d ago also EUVD-2026-83563
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 39%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 50 d ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- tiktokbusinessplugin TikTok
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
- wordfence.com /threat-intel/vulnerabilities/id/31233f4e-4cd5-497f-9e8a-c65635596241?source=cve
- plugins.trac.wordpress.org /browser/tiktok-for-business/tags/1.4.0/admin/Tt4b_Menu_Class.php#L417
- plugins.trac.wordpress.org /browser/tiktok-for-business/tags/1.4.0/admin/tt4b_menu.php#L13
- plugins.trac.wordpress.org /browser/tiktok-for-business/tags/1.4.0/admin/Tt4b_Menu_Class.php#L397
- plugins.trac.wordpress.org /browser/tiktok-for-business/tags/1.4.0/mapi/Tt4b_Mapi_Class.php#L332
- plugins.trac.wordpress.org /changeset?reponame=&old=3699236%40tiktok-for-business&new=3699236%40tiktok-for-business
Sources
- CVE List CVE-2026-18346
- NVD CVE-2026-18346
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.