[pmwiki-users] Is ability to insert HTML a bug?

[ljb]

Two meta-questions, please: I came across a way a PmWiki-2.1.5 user can
insert any bit of HTML into a wiki page and have it returned to the browser
without escaping.  Is this a bug? (I think it probably is.) Is this a serious,
security-type bug? (I think it isn't, but PmWikiPhilosophy says it can be.)
So should I give details and a patch here, on PITS, or some other way?