On 07/01/2020 20:20, Michael Haardt via Exim-users wrote:
>   I did
> not really follow the list recently, so I missed the introduction of
> "tainted" expansions,

To follow up on that point:

ChangeLog, 4.93 :-

JH/32
Introduce a general tainting mechanism for values read from the input
   channel, and values derived from them.  Refuse to expand any tainted
values, to catch one form of exploit.
-- 
Cheers,
  Jeremy

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