Submitted by pauliax, also found by hack3r-0m
Anyone can call function vestFor and block any user with a tiny amount of Vader. This function has no auth checks so a malicious actor can front-run legit vestFor calls with insignificant amounts. This function locks the user for 365 days and does not allow updating the value, thus forbids legit conversions.
Consider introducing a whitelist of callers that can vest on behalf of others (e.g. Converter).
SamSteinGG (Vader) confirmed
