CVE-2026-18346 TikTok <= 1.4.1 - Missing Authorization to Unauthenticated TikTok Integration Takeover via 'auth_code' Parameter
Unauthenticated attackers can hijack TikTok integration by overwriting access tokens if they possess a valid OAuth auth_code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18346?
CVE-2026-18346 is a medium-severity missing authorization vulnerability in tiktokbusinessplugin TikTok, published on 19 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-18346?
How do I fix CVE-2026-18346?
No fix has been published for CVE-2026-18346 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-18346 being exploited?
There is no known exploitation of CVE-2026-18346 in the wild and no public exploit code.
Sources
Also known as GHSA-4cq5-hfg6-vrqv.