An infectious worm is spreading on Tumblr Monday morning, affecting several major blogs.

Tumblr spokesperson Katherine Barna sent the following email to Mashable regarding the worm:

“There is a viral post circulating on Tumblr which begins ‘Dearest ‘Tumblr’ users.’ If you have viewed this post, please log out of all browsers that may be using Tumblr immediately. Our engineers are working to resolve the issue as swiftly as possible.”

While Tumblr remains online, posting is currently disabled. A pre-emptive password reset is probably a good idea for any Tumblr user reading this post. The truly cautious may wish to avoid Tumblr entirely until the mess is sorted out.

Source: Mashable