Lumin PDF 2019 Data Breach
ObscureIQ Breach Intelligence
Low SeverityWebsite / service breach
Lumin PDF Document Collaboration Tool Breach (2019): 24 Million User Accounts Including Auth Tokens & Passwords Exposed
Online PDF editing and collaboration tool.
Verified by ObscureIQ Intelligence
23/100Breach Risk Index
5Data Value
25Market Recency
584dSince Breach
Breach Intelligence Summary
Entity: Lumin PDF · Actor: Unknown · Sources: 7 references
Attack: Database Exposure
Profile: Platform · Document editing and collaboration · SaaS PDF tools · Global
Timeline: Breach (2019-04-01) · Indexed (Dec 01, 2024) · Year (2019)
Exposure: 24.4M records · 7 fields: Authentication Token, Email Address, Full Name, Gender, Password, Spoken Language, Username
Status: Confirmed
Executive Summary
In April 2019, a MongoDB instance in Lumin PDF testing infrastructure was accessed by a third party and, after the company reportedly ignored notifications, the data was posted to a hacking forum in September 2019. The dump contained roughly 24.3 million email addresses (about 15.4 million unique) along with names, genders, spoken languages, usernames, and either a bcrypt password hash or a Google authentication token.
ObscureIQ assessment: Exposure enables account takeover, phishing, and document-themed scams. Metadata and collaboration history can also help attackers map business relationships and document flows.
Breach Impact
Exposure of Google auth tokens alongside account details created session/account-takeover risk for linked Google Drive access, compounding standard credential-reuse exposure.
About Lumin PDF
Lumin PDF is a cloud-based PDF editing and document-management service that integrates with Google Drive, used by individuals and businesses to view, annotate, and collaborate on documents.
Why They Hold Your Data
Document-editing platforms collect user accounts, emails, billing records, document metadata, collaboration history, and cloud-linked access records across PDF workflows.
Recent Developments
Lumin PDF continued operating after the incident. Reporting indicated the company was notified of the exposed database multiple times before the data was ultimately leaked publicly.
Data Points Exposed
7 verified field types
Authentication Token Critical
Email Address
Full Name High
Gender
Password Critical
Spoken Language
Username
Field names are shown in full for clarity and search visibility. Canonical machine keys are emitted only in this page’s structured data.
Exploitation & Downstream Threats
Threat Activity:High
Primary downstream threats:
- Credential stuffing against reused passwords across other platforms
- Targeted phishing campaigns using exposed email addresses
Threat vectors:
- Session hijacking & account takeover
- Phishing, credential stuffing & account takeover
- Name-based social engineering
- Profile enrichment
- Credential stuffing & account takeover
- Targeted phishing localization
- Cross-platform tracking & credential stuffing
Recommended Actions
If you believe your information may be included:
Change Reused Passwords
Update this account and anywhere you reused the password; use a manager.
Enable MFA Everywhere
Turn on multi-factor authentication on email first, then financial accounts.
Report & Recover
If you spot misuse, start an official recovery plan and report fraud.
Frequently Asked Questions
What happened in the Lumin PDF breach?▾
In April 2019, a MongoDB instance in Lumin PDF testing infrastructure was accessed by a third party and, after the company reportedly ignored notifications, the data was posted to a hacking forum in September 2019. The dump contained roughly 24.3 million email addresses (about 15.4 million unique)…
What data was exposed?▾
Verified fields include Authentication Token, Email Address, Full Name, Gender, Password, Spoken Language, Username.
What should I do if I was affected?▾
Change reused passwords, enable MFA, and (if identity or financial data is involved) freeze your credit and monitor your accounts.
Sources & References
Every claim on this page is traceable. This breach draws on:
Breach Index
Breach Index
Cross-source
9ghz
Cross-source
Dehashed
Cross-source
Keeper
Cross-source
leakfind
ObscureIQ Intelligence
ObscureIQ proprietary analysis
Protect Yourself
Check If You're Affected
Enter your email to check whether your data appears in this breach. We’ll send a 6-digit code to confirm it’s your address.
Get Free Breach Alerts
Be the first to know when new breaches are disclosed. Free forever — confirm your email with a 6-digit code.
High-Risk? Get an Exposure Audit
Executives, public figures, and high-visibility operators can receive tailored exposure intelligence and hardening guidance.
Request Consultation