The move likely won't have direct impact on most enterprise users, but indirect impact -- which could be just as bad -- is a definite possibility.

Automattic CEO Matt Mullenweg on Friday announced a shutdown of almost all services on WordPress.org, the open source project site that's the home of the software, plugins, and the WordPress community, but was unclear on when the shutdown would end.

This move sharply increases the uncertainty surrounding WordPress, which is the software that runs roughly a third of the top 10,000 web sites by traffic, IDC said.

"My sense is that many enterprise WordPress administrators will think twice about continuing to use the software under these circumstances," said IDC Research Manager Michele Rosen. "It's such a shame to watch a leader in the open source community repeatedly sabotage his own project."