Data breach
XKCDxkcd.com
561 991 accounts exposed in a breach dated 2019-07-01.
Breached2019-07-01Added to HIBP2019-09-01 UTCUpdated by HIBP2019-09-01 UTCAccounts561 991Domainxkcd.com
Verified
What happened in Have I Been Pwned’s words
In July 2019, the forum for webcomic XKCD suffered a data breach that impacted 562k subscribers. The breached phpBB forum leaked usernames, email and IP addresses and passwords stored in MD5 phpBB3 format. The data was provided to HIBP by white hat security researcher and data analyst Adam Davies.
Exposed data as HIBP classifies it
- Email addresses
- IP addresses
- Passwords
- Usernames
How HIBP qualifies it
- HIBP verified that the data came from this service.
Source: Have I Been Pwned (CC BY 4.0)
Copied from HIBP 2026-11-05 03:50 UTC