Singer Maxine Jones, who left the band earlier this month, revealed on her Twitter page that her bandmates Terry Ellis and Cindy Herron "forced" her out and have taken legal action against her.
She wrote: "Yup Terry n Cindi r evil! They took over the LLC n bank acct, forced me out, gave my gigs to that chick LOL, and SUING #ME!
"@MaxineJonesEV Real arrogant bitches drunk over power lol! My lawyer and I look forward to court! We're gonna catch it on our reality show 2 lol."
Former member Dawn Robinson, with whom Jones plans to form a new version of the group, added: "Don't worry about it Max lol! The truth about they're asses had to come out sooner or later! Do NOT erase these messages lol!"
En Vogue's original lineup reformed in 2010, where they played a series of shows including a date at London's Indigo2.
The band released three successful albums in the 1990s and a string of hit singles, including 'Hold On', 'My Lovin' (You're Never Gonna Get It)' and their signature song 'Don't Let Go (Love)'.
Watch the music video for 'Don't Let Go' below: