CVE-2026-18346

Deferred Deferred - Pending Action

Authorization Bypass in TikTok WordPress Plugin

Publication date: 2026-09-19

Last updated on: 2026-09-21

Assigner: Wordfence

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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-19

Last Modified

2026-09-21

Generated

2026-10-10

AI Q&A

2026-09-20

EPSS Evaluated

2026-10-09

NVD

CVE-2026-18346

Affected Vendors & Products

Vendor	Product	Version / Range
tik_tok	plugin	to 1.4.1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

The TikTok plugin for WordPress has an authorization bypass flaw in versions up to 1.4.1. The plugin fails to properly verify user permissions before allowing actions. This lets unauthenticated attackers overwrite the merchant's TikTok integration access token stored in wp_options. The attack hijacks the site's TikTok Business and product catalog integration by exploiting a token exchange process that requires a valid TikTok OAuth auth_code and a successful 'OK' response from TikTok's API.

Detection Guidance

To detect this vulnerability, check if the TikTok plugin for WordPress is installed and verify its version. If it is version 1.4.1 or lower, it is vulnerable. Inspect the wp_options table in your WordPress database for unauthorized changes to the TikTok integration access token.

Impact Analysis

If exploited, this vulnerability allows attackers to take control of your WordPress site's TikTok Business and product catalog integration. They can replace the legitimate access token with their own, redirecting TikTok-related data and functionality to their control. This could lead to unauthorized access to your TikTok business account, manipulation of product catalogs, or disruption of TikTok-related features on your site.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized access to a site's TikTok Business integration. If an attacker overwrites the access token, they may gain control over data shared between the site and TikTok, which could include user data or business information. This unauthorized access may violate data protection requirements under GDPR and HIPAA if sensitive data is exposed or improperly handled.

Mitigation Strategies

Update the TikTok plugin for WordPress to the latest version beyond 1.4.1 to ensure proper authorization checks are in place.

Hi! I’m here to help you understand CVE-2026-18346. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70