Trello 2024 Data Breach
ObscureIQ Breach Intelligence
Low SeverityWebsite / service breach
Trello Project Management Platform API Scrape (2024): 15 Million User Records Including Full Names Exposed
Project management and collaboration software.
Verified by ObscureIQ Intelligence
8/100Breach Risk Index
3Data Value
10Market Recency
826dSince Breach
Breach Intelligence Summary
Entity: Trello · Actor: Unknown · Sources: 5 references
Attack: Misconfiguration
Profile: Platform · Project management and collaboration tools · SaaS productivity platform · Global
Timeline: Breach (2024-01-16) · Indexed (Jan 22, 2024) · Year (2024)
Exposure: 15.1M records · 3 fields: Email Address, Full Name, Username
Status: Confirmed
Executive Summary
Trello, the Atlassian-owned project management platform, had data from over 15 million user accounts scraped and posted for sale on a hacking forum in January 2024. A threat actor exploited a publicly accessible API endpoint, feeding email addresses from previous data breaches into it to retrieve matching Trello profile information, including names, usernames, and email addresses. Atlassian disputed calling it a breach, stating that no unauthorized system access occurred and that the data was assembled through a public-facing feature. The company subsequently restricted the relevant API endpoint. The exposed data includes names, usernames, and email addresses. While no passwords or financial data were involved, the combination of a real name tied to a confirmed email address is particularly useful for attackers. It allows them to verify the identity behind an account, making phishing attempts more convincing and targeted. No class-action litigation or regulatory enforcement action specific to this incident has been widely documented. For affected users, the practical risk is an increased likelihood of receiving personalized phishing emails or being targeted in credential stuffing attacks if their email address appears in other breaches. Users should be cautious of unsolicited emails referencing Trello or Atlassian products and consider whether their email address is associated with a strong, unique password on other services.
ObscureIQ assessment: Exposure enables phishing, account takeover, and leakage of internal planning or business processes. Collaboration data can also reveal teams, projects, deadlines, and organizational structure.
Breach Impact
In January 2024 a threat actor scraped data from Trello by enumerating a publicly accessible API endpoint, matching email addresses from previous breach corpora against Trello user profiles to harvest names, usernames, and email addresses for more than 15 million accounts. Trello disputed the characterization as a breach, stating that no unauthorized access to its systems had occurred and that the data was assembled by exploiting a public-facing feature rather than through a system compromise. Atlassian subsequently restricted the relevant API endpoint. No class-action litigation or regulatory action specific to this incident has been widely documented in public sources.
About Trello
Trello is a project management and visual collaboration tool built around kanban-style boards, lists, and cards. It was acquired by Atlassian in 2017 and operates as part of the Atlassian product suite alongside Jira and Confluence. The platform serves individual users, small teams, and enterprise organizations globally through free and paid subscription tiers.
Why They Hold Your Data
Project-management platforms collect user accounts, emails, team relationships, board content, task history, attachments, and workflow activity tied to collaboration and operational planning.
Recent Developments
Trello continues to operate as part of the Atlassian portfolio. Atlassian has been consolidating its cloud product strategy and discontinuing some older server-based deployment options across its suite. Trello's development has focused on integrations and automation features. No major standalone Trello organizational changes beyond the broader Atlassian context have been prominently reported.
Data Points Exposed
3 verified field types
Email Address
Full Name High
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:
- Targeted phishing campaigns using exposed email addresses
Threat vectors:
- Phishing, credential stuffing & account takeover
- Name-based social engineering
- Cross-platform tracking & credential stuffing
Recommended Actions
If you believe your information may be included:
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 Trello breach?▾
Trello, the Atlassian-owned project management platform, had data from over 15 million user accounts scraped and posted for sale on a hacking forum in January 2024. A threat actor exploited a publicly accessible API endpoint, feeding email addresses from previous data breaches into it to retrieve…
What data was exposed?▾
Verified fields include Email Address, Full Name, 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
BreachForums_Official_Index
Cross-source
Dehashed
ObscureIQ Intelligence
ObscureIQ proprietary analysis
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