Turnitin incident

Turnitin Service Incident - 11th December 2025

Turnitin experienced a major incident on December 11, 2025 affecting Turnitin Logins and Native website login and 1 more component, lasting 27m. The incident has been resolved; the full update timeline is below.

Started: Dec 11, 2025, 04:31 PM UTC
Resolved: Dec 11, 2025, 04:58 PM UTC
Duration: 27m
Detected by Pingoru: Dec 11, 2025, 04:31 PM UTC

Affected components

Turnitin LoginsNative website loginAPI(v2) Website Logins(v2) API

Update timeline

investigating Dec 11, 2025, 04:31 PM UTC

We’ve run into some issues. Turnitin Similarity, SimCheck, Originality, Authorship, iThenticate V2, Crossref Similarity Check in Europe are currently experiencing an unexpected service incident, users accessing these services via an integration may also be affected. During this time, you may find that users are unable to log in or access this service. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
resolved Dec 11, 2025, 04:58 PM UTC

We’ve fixed it! Due to an unexpected service incident, users accessing the services via the following products: Turnitin Similarity, SimCheck, Originality, Authorship, iThenticate V2, Crossref Similarity Check in Europe may have experienced difficulties logging in to their account. Users accessing these services via an integration may also have been affected. We are pleased to advise that service has been restored. The incident occurred between the following times: PST: Thursday, 11 December 05:00–08:37 GMT: Thursday, 11 December 13:00–16:37 AEDT: Friday, 12 December 00:00–03:37 We regret any inconvenience this may have caused if you were impacted by today’s incident.