bookcrossing.com
May 30, 2026
A breach of BookCrossing, the online book-sharing community, containing member data including usernames, plaintext passwords, names, email addresses, dates of birth, zip codes, geographic IDs, IP addresses, profile information, newsletter preferences, and other account metadata.
Data found in this dataset
Source files
Expand any file to inspect its column headers and the LLM's field-mapping reasoning, recorded during ingestion.
BookCrossing_BF__data__Members.csv7 columns1,571,764 rows
File structure
Format: CSV·Delimiter: comma·Has header: yes·Quote: "
| Source column | Mapped field | Confidence | LLM assessment |
|---|---|---|---|
| 1 | high | [1] header 'Email', values are email addresses (masked in sample but structure evident with @ domain pattern) | |
| 2 | username | high | [2] header 'UserName', values are usernames (kascrow, askia, iamsockmonkey, deasisrocks) |
| 3 | password | high | [3] header 'Password', values are plaintext passwords (chloenell, rxfn9385, bettykat, sman, deasisrocks) |
| 4 | firstName | high | [4] header 'FirstName', values are given names (Kristina, Kara, j, Danny, Jessica) |
| 5 | lastName | high | [5] header 'LastName', values are family names (Hollabaugh, C, Miller, DeAsis, Leser) |
| 6 | zip | high | [6] header 'ZipCode', values are 5-digit postal codes (40205, 16226, 84032, 85202, 50968) |
| 15 | dob | high | [15] header 'DateOfBirth', values are dates in YYYY-MM-DD format (1959-09-14, 1973-01-17, 1986-01-06) |
Notes: 41 columns total, 7 contain PII. Columns 0 (Id), 7-9 (CityId, StateId, CountryId — internal geographic codes), 10-14, 16-40 are non-PII: referral data, preferences, flags, timestamps, verification codes, affiliate data. Column 33 (IpAddress) is skipped per exclusion rules (network identifier). Emails are partially masked in sample but clearly email addresses. Plaintext passwords present.