[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f3jxgx6wndflks":3},{"success":4,"breach":5},true,{"_id":6,"name":7,"title":8,"slug":9,"domain":10,"breachDate":11,"addedDate":12,"modifiedDate":13,"contentUpdatedAt":14,"source":15,"sourceUrl":16,"sourceUrls":17,"pwnCount":20,"affectedCount":20,"affectedCountStatus":21,"affectedCountLowerBound":22,"affectedCountUnit":23,"hasEnglishDescription":4,"severity":24,"dataClasses":25,"description":30,"seoTitle":31,"seoTitleEn":32,"seoDescription":31,"seoDescriptionEn":33,"logoUrl":34,"isVerified":4,"isSensitive":35,"isSpamList":35,"isMalware":35,"company":36},"68e3266eda11adda48825297","MangaDex","MangaDex Data Breach","mangadex","mangadex.org","2021-03-22T00:00:00.000Z","2021-04-25T21:38:51.000Z","2021-04-25T21:41:24.000Z","2026-07-18T23:53:52.621Z","Community website breach","https:\u002F\u002Fwww.bleepingcomputer.com\u002Fnews\u002Fsecurity\u002Fmangadex-discloses-data-breach-after-stolen-database-shared-online\u002F",[16,18,19],"https:\u002F\u002Fmangadex.org\u002F","https:\u002F\u002Fmangadex.dev\u002F",2987329,"known",null,"unknown","Critical",[26,27,28,29],"Email addresses","IP addresses","Passwords","Usernames","\u003Cp>The MangaDex data breach is a significant account security incident at the manga reading and community platform tracked as of March 22, 2021, affecting 2,987,329 user records. The verified data fields include email addresses, IP addresses, usernames, and password hashes stored in bcrypt format. This distinction is important: the record does not mean that passwords were leaked in plaintext; however, the password hashes may be sufficient for attackers to try to find weak passwords through offline testing processes. Therefore, the MangaDex breach poses a serious risk of account takeover, especially for individuals who use the same password on other forums, email, gaming, social media, or content platforms.\u003C\u002Fp>\n\u003Cp>MangaDex is an online fan site that has grown around manga readers and translation communities. In such communities, the combination of username, email, and IP address can serve not only as a technical record but also as a piece of a profile that helps establish links between a person's reading interests, online identity, and different accounts. After a breach, users' priorities should be making their passwords unique, checking other accounts opened with the same username, and being cautious against fake support, account recovery, or security notification messages that may arrive via email.\u003C\u002Fp>\n\u003Ch2>Leaked Data Types and Risks\u003C\u002Fh2>\n\u003Cp>Email addresses seen in the MangaDex registration can be used for targeted phishing messages and fake account alerts. Usernames make it easier to match different profiles if the same nickname is used on other sites. IP addresses do not provide a precise home address, but they can give clues about the approximate connection area, internet service provider, and session history. When these fields are combined, attackers can create more convincing support messages, account security alerts, or impersonation attempts within the community.\u003C\u002Fp>\n\u003Cp>The password field requires special attention. Verified information shows that passwords are hashed with bcrypt. This provides better protection than plain text password leaks, but weak, short, or previously compromised passwords are still at risk. If the same password is used on other accounts, attackers can attempt to log in to other services using email and username combinations. Therefore, the risk should not be considered limited to the MangaDex account alone.\u003C\u002Fp>\n\u003Ch2>Verified Scope and Boundaries\u003C\u002Fh2>\n\u003Cp>The verified scope consists of 2,987,329 affected accounts, a breach date of March 22, 2021, an addition date of April 25, 2021, and four types of data: email addresses, IP addresses, usernames, and password hashes. Payment card, phone number, physical address, real name, ID, date of birth, or health data do not appear as verified fields for this record. Therefore, the risk to be communicated to the user should be addressed around account security, profile matching, phishing, and password reuse.\u003C\u002Fp>\n\u003Cp>The incident on the MangaDex side became clearer after it was determined that the user database circulated among threat actors following the attack. Verified sources indicate that members’ usernames, email addresses, last known IP addresses, and securely hashed password fields may have been exposed. Nevertheless, it should not be concluded that each user's actual password could be read directly. The most appropriate approach is to change all reused passwords, taking into account the possibility that passwords could be cracked.\u003C\u002Fp>\n\u003Ch2>User Groups at Risk\u003C\u002Fh2>\n\u003Cp>The users at the highest risk are those who reuse the password from their MangaDex account on other services. People who open forums, game, streaming, social media, or email accounts with the same email and username also increase the risk of profile matching. It is common for pseudonyms to remain the same for a long time on community platforms; this can help attackers link different accounts to a single person. In particular, old and short passwords, passwords containing dictionary words, and passwords that have previously been leaked elsewhere carry a high risk.\u003C\u002Fp>\n\u003Cp>For users with an IP address, the risk is more about privacy and targeting. An IP address alone does not reveal the entire identity, but when combined with an email and username, it can provide clues about the user's connection habits. People who are active in manga or similar interest communities can be targeted with fake moderator messages, fake account verification requests, or private messages containing links. Therefore, not only the email inbox but also notifications and private messages on community accounts should be examined carefully.\u003C\u002Fp>\n\u003Ch2>Urgent Measures to Be Taken\u003C\u002Fh2>\n\u003Cp>If your MangaDex account appears in this record, the first step is to change the password you use for MangaDex and any other accounts that use the same password to unique passwords. The best method is to generate long and random passwords for each service using a password manager. Priority should be given to checking your email account, social media accounts, gaming accounts, and payment-linked services. The login history, unknown sessions, newly added recovery addresses, and unexpected security notifications of the accounts should also be examined.\u003C\u002Fp>\n\u003Cp>This protection should be enabled on services that offer two-step verification. The email account is particularly important because the password reset process for many services proceeds through email. Instead of clicking directly on security warnings that come with names like MangaDex or similar communities, open the relevant site yourself and check the login status. Do not respond to requests for passwords, recovery codes, or additional security information in private messages or emails.\u003C\u002Fp>\n\u003Ch2>Long-Term Security Strategies\u003C\u002Fh2>\n\u003Cp>For long-term protection, it is useful to separate usernames, email addresses, and passwords according to different purposes. The main email account can be used for critical services, while community and hobby accounts can be used for a separate address. Not using the same nickname everywhere makes it harder to link different profiles. A password manager makes it easier to detect reused passwords and generate strong passwords for each account.\u003C\u002Fp>\n\u003Cp>Old community accounts should be reviewed at regular intervals. Unused accounts should be closed, unnecessary personal information should not be kept on active accounts, and login methods should be kept up to date. Since fields like IP address and username can be used for profile matching even years later, the impact of old breaches does not completely disappear over time. Therefore, after incidents like MangaDex, a one-time password change should not be considered sufficient; regular account security habits should be made permanent.\u003C\u002Fp>\n\u003Ch2>Record Control and User Action\u003C\u002Fh2>\n\u003Cp>If you see a match in a MangaDex breach, first list the accounts opened with your affected email address. Then determine on which services the same or similar password has been used and start changing passwords from the most critical accounts. If you use your username on other platforms, assess whether linking these profiles poses a privacy risk for you. End old sessions, update recovery options, and keep security alerts enabled.\u003C\u002Fp>\n\u003Cp>This record should not be considered as a leak of real name, payment card, or physical address; it comes from a combination of verified risk email, IP address, username, and password hash. The most accurate action for users with matches is to make passwords unique, secure the email account strongly, and be cautious of fake support messages. Although the MangaDex breach is outdated, the risk can still persist today if the same password has been reused for years.\u003C\u002Fp>","","MangaDex Data Breach (3 Million Reported Records)","MangaDex Data Breach. 3 Million reported records were reported. Reported data: Email addresses, IP addresses, Passwords. Review the scope, risks, and…","\u002Fuploads\u002Flogo\u002Fmangadex_org.webp",false,{"name":7,"sector":37,"country":38,"website":10,"websiteArchiveUrl":31,"websiteStatus":31,"websiteCheckedAt":22},"Manga \u002F Online Community","Unknown"]