The Download HTML TinyMCE Button WordPress plugin through 1.2 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.

Movable Type contains a stored cross-site scripting vulnerability in the HTML edit mode of MT Block Editor. It is exploitable when TinyMCE6 is used as a rich text editor and an arbitrary script may be executed on a logged-in user's web browser.

moxieplayer.as in Moxiecode moxieplayer, as used in the TinyMCE Media plugin in WordPress before 3.5.2 and other products, does not consider the presence of a # (pound sign) character during extraction of the QUERYSTRING, which allows remote attackers to pass arbitrary parameters to a Flash application, and conduct content-spoofing attacks, via a crafted string after a ? (question mark) character.

Cross Site Scripting vulnerability in TinyMCE v.4.9.6 and before and v.5.0.0 thru v.5.1.4 allows an attacker to execute arbitrary code via the editor function.