Mappery

Disclosed Dec 18, 2018205,242 accountsUnverified

In December 2018, the mapping website Mappery suffered a data breach that exposed over 205k unique email addresses. The incident also exposed usernames, the geographic location of the user and passwords stored as unsalted SHA-1 hashes. No response was received from Mappery when contacted about the incident.

What is known

People affected	205,242 (accounts in the leaked data, per Have I Been Pwned)
Disclosed	Dec 18, 2018
Happened	Dec 11, 2018
Attack	Not stated
Data exposed	EmailsLocationPasswords
Sector	Tech
Status	Unverified: not yet confirmed by an official notice, a filing or the organization
Check your email	Have I Been Pwned

Sources

Aggregatorhaveibeenpwned.com

Have I Been Pwned: Mappery

Notices filed

Accounts in the dataDec 18, 2018

Have I Been Pwned205,242 people

History of this record

Added2026-09-25

First recordedby backfillSource

First seen 2026-09-25 (Have I Been Pwned). Record counts are as reported. Not legal advice.

Everything about Mappery