Weakness
WordPress plugin (Spiffy Plugin) before 5.0.9 is affected by Stored Cross-Site Scripting in Event Title field. An authenticated attacker with the lowest privileged role (contributor) can exploit this to redirect user to malicious site or control the account.
References
Find the bug before an attacker does.
Sign in with GitHub and run your first audit in under a minute. The free plan needs no credit card.