CVE-2026-92965 in TikTok Plugin
Summary
by MITRE • 09/20/2026
The TikTok WordPress plugin before 1.4.2 does not check that a request is authorised before acting on a sign-in code supplied in the URL, so any visitor can make the site redeem a code of their choosing against the advertising platform, using the site's own credentials. It matches that code loosely, so URLs that merely resemble the expected one trigger it too, and the callback runs on every request to the site rather than only on the administrator's sign-in.
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Analysis
by VulDB Data Team • 09/20/2026
The vulnerability identified in TikTok WordPress plugin versions prior to 1.4.2 represents a critical failure in access control mechanisms, specifically classified under CWE-287: Improper Authentication and CWE-306: Missing Authentication for Critical Function. This flaw allows any unauthenticated visitor to the website to manipulate the integration with the TikTok advertising platform by supplying arbitrary sign-in codes within URL parameters. The core technical deficiency lies in the plugin's failure to verify that incoming requests originate from authorized administrative sessions or possess valid authentication tokens before processing sensitive operations related to account linking and credential redemption.
The operational impact of this vulnerability is severe, as it enables an attacker to hijack the site's TikTok advertising credentials without prior authorization. By crafting URLs containing specific sign-in codes that loosely match the expected format, attackers can trigger the callback logic on every request directed at the site. This behavior bypasses standard security boundaries because the plugin does not restrict this functionality exclusively to administrator-initiated sign-in flows. Consequently, an attacker can force the WordPress installation to redeem a code of their choosing against the TikTok advertising platform using the victim's credentials, effectively taking control over the associated ad account or disrupting ongoing campaigns.
This type of attack aligns with MITRE ATT&CK technique T1078: Valid Accounts, where adversaries leverage legitimate system accounts for unauthorized access and persistence. The loose validation logic further exacerbates the risk by allowing near-miss URL patterns to trigger the vulnerable code path, increasing the surface area for exploitation beyond strictly formatted inputs. This lack of strict input sanitization and session verification creates a predictable attack vector that can be automated easily by threat actors seeking to compromise digital advertising infrastructure or cause denial-of-service conditions through unauthorized API calls.
Mitigation strategies must prioritize immediate patching to version 1.4.2 or later, where the developers have addressed these authentication gaps. In environments where updating is not immediately feasible, administrators should implement web application firewall rules that restrict access to plugin endpoints handling OAuth callbacks and sign-in codes to known administrative IP addresses or require valid session cookies for such requests. Additionally, enforcing strict input validation on URL parameters related to TikTok integration can help prevent the execution of unintended callback logic by ensuring that only properly formatted and authenticated requests are processed by the application backend.