MangaDex is one of the largest manga scanlation (scanned translations) sites where visitors can read manga comics online for free. MangaDex has suffered a series of outages since March 17th. A threat actor gained access to the site after stealing an admin user’s session token through a website vulnerability. The attacker then published the site’s source code on GitHub using the alias ‘holo-gfx’ MangaDex temporarily shut down the site while they work on and launched a more secure ‘v5’ version of the site.
Source: https://www.bleepingcomputer.com/news/security/mangadex-manga-site-temporarily-shut-down-after-cyberattack/