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Lumin PDF Data Breach

Understand what this public breach record reports and choose next steps based on the information involved.

Breach date: April 1, 201915,453,048 affected accounts in the record
01

What happened?

In April 2019, the PDF management service Lumin PDF suffered a data breach . The breach wasn't publicly disclosed until September when 15.5M records of user data appeared for download on a popular hacking forum. The data had been left publicly exposed in a MongoDB instance after which Lumin PDF was allegedly been "contacted multiple times, but ignored all the queries". The exposed data included names, email addresses, genders, spoken language and either a bcrypt password hash or Google auth token.

02

When did it happen?

The breach date in the public record is April 1, 2019. The record was added to the catalogue on September 18, 2019 and last updated there on September 18, 2019.

03

What information was reported as exposed?

  • Auth tokens
  • Email addresses
  • Genders
  • Names
  • Passwords
  • Spoken languages
  • Usernames

These are incident-level categories. The record does not prove that every category was exposed for every affected person.

04

Who may be affected?

This record may be relevant to people who had an account or other relationship with Lumin PDF or used luminpdf.com around April 1, 2019. A catalogue entry does not establish that every customer was affected or that every listed data category applied to each person. Compare the record with an official notice addressed to you.

05

What should you do?

Verify whether the notice applies to you

Compare the organization, dates, and information categories with any notice you received. Use contact details you independently confirm.

Secure affected accounts

Change exposed or reused passwords, begin with your email account, and turn on multi-factor authentication where available.

Expect targeted phishing

Treat unexpected breach follow-ups with caution. Do not use links or phone numbers in a suspicious message; contact the organization directly.

Choose actions that match the information involved. If you find signs that someone is using your identity, the Federal Trade Commission provides a personal recovery plan at IdentityTheft.gov.

Sources and review information

Page reviewed September 14, 2026 by the Data Breach Help Editorial Team. Catalogue details reflect the provider record and may change.