So blocking underscores is definitely a security feature!
Just to check,
\text{escapetolisp = maxima(to_lisp();)}
\statement{Repondre a la question svp.<br />
escapetolisp = \escapetolisp}in an oef source gives
Repondre a la question svp.
escapetolisp = toklisp()So to_lisp is disabled.
I suspect that eval_string probably should remain disabled too – as it
is at the moment with underscores being replaced by « K » (which then becomes
« k »). The « ? » escape to lisp leads to a rapid exit(1):
https://subversion.renater.fr/wimsdev/trunk/wims/src/Interfaces/maxima.c