Fans cheer as popular online platform for spinoff stories nears full return after security incident

In a comeback tale like one from Harry Potter battling back his nemesis or a “Heated Rivalry” hockey hero rebounding from injury, a top global fandom site that was sidelined by a security incident is now on the mend.

The activist group behind the popular Archive of Our Own, or AO3, platform, a collaborative online space which serves up fans’ spinoff narratives derived from well-known published stories, says it’s undergoing a limited return after a shutdown on Oct. 29.

“AO3 is now up!” said a status page for the Organization for Transformative Works, an activist group behind the platform, on Sunday.

The outage sent fans of the platform — readers and authors alike — into a desperate void for the past two weeks, with a “Bad Gateway” message stirring frustration. Some authors were outraged when readers uploaded their works to Google Drive and other platforms without their permission during the outage.

The return drew many expressions of joy Sunday.

The organization, in a summary it posted on Instagram of its 2025 results, said nearly 2.6 million AO3 works were created, with nearly 40 billion page views. Nearly 2 million accounts have been created, it said.

AO3 hasn’t been without its critics, who have warned about sexual content that could be available to minors and fandom racism through the platform.

The group said some features like user icons have been disabled and importing of external work isn’t available, while downloads are currently only possible in the web-language HTML format. It promised those features will ultimately return.

“We understand that the wait and uncertainty surrounding AO3’s return have been difficult, and we apologize for the inconvenience,” the status update said.

The organization hasn’t specified the cause of the security incident, but at least one expert says AI-enabled exploits might have been a factor.

Mel Stanfill, a professor at the University of Central Florida who has written about the challenges of content moderation at scale with an all-volunteer team, hailed the “relatively quick” return and compared the outage to a recent one at Microsoft — which has far more resources and paid staff.

Stanfill, who volunteers for an academic journal run by the organization but does not speak on its behalf, said in an email that such security incidents “are likely to continue to happen in the age of AI-enabled coding as the finding and exploiting of exploits is scaled up rapidly.” He noted that “it is difficult even for organizations with billions in revenue to solve these problems.”

From fanfic to podfic: New media emerge

In late October, the team predicted that the security incident would take up to four weeks for AO3 to get back up, while floating the prospect of a partial revival “in a degraded state” — which appears to be what was taking place on Sunday.

The organization said contributors’ “works, bookmarks, kudos, etc., are still safe” and that no drafts were deleted during the outage — but it couldn’t rule out that the user database might have been compromised.

AO3 is a hub of content from fans who have produced content that riffs off fiction, art and other culture and entertainment: Imagine a repository of sequels, prequels and derivatives dreamt up by adoring aficionados of some of the world’s best-known titles.

The result is catchy products like “fanfic” — fiction from fans — and similar fanart, as well as “podfics,” readings of narratives shared in audio form.

A recent listing of “ship stats” — or the number of references to relationships of stars from literature — shows that pairings of characters featured in the Harry Potter, Heated Rivalry and anime fandoms were the most prominent this summer.

The platform, which is run by volunteers, went fully public in 2009, and has shown strong user growth: In June, the Organization for Transformative Works said AO3 had 11 million registered users — up from 10 million four months earlier. It said the archive was nearing 18 million works.

The reaction from many fans of the fandom platform was swift and exuberant about its return.

“So, we’ve all agreed we don’t need to sleep tonight, now that AO3 is finally back, right? Right!?” quipped a user going by the name of yet.another.loon on the Threads social media site.

User Verkielos gushed: “Just got email from AO3 about a fic update. The world is healing!”

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Associated Press writer Stefanie Dazio in Berlin contributed to this report.