Trello 2024 Data Breach
Platform · Project management and collaboration tools · SaaS productivity platform · Global
Trello Project Management Platform API Scrape (2024): 15 Million User Records Including Full Names Exposed
Project management and collaboration software.
Scrape · ObscureIQ Intelligence
Breach Risk Index i
8/100
Lower riskHigher risk
Lower: limited current risk based on data value and recency.
Data Sensitivity i
StandardExposed data is largely lower-sensitivity. Standard identity-protection precautions are advised.
15.1MRecords
2024Year
The Breach Risk Index (BRI) is a proprietary 0–100 score rating how dangerous a breach is right now, based on how recently the data has been circulating on the dark web and how valuable it is to attackers.
Breach 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.
Full threat analysis, exploitation vectors, and principal guidance below.
10 additional sections · verified field analysis · defensive doctrine
Querying breach corpus…
Cross-referencing exposed field types…
Resolving threat-actor attribution…
Compiling principal risk advisory…
15.1M records analyzed
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
Username
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.
Exploitation & Downstream Threats
• Targeted phishing campaigns using exposed email addresses
Principal Risk Advisory
What this means for a principal
A consumer-service breach: contact and account data supports phishing, account takeover and profile enrichment. For a high-profile principal the main risk is credible impersonation and enrichment of existing exposure.
What You Should Do
- Do not use unofficial 'am I affected' lookups; several are themselves harvesting operations.
How ObscureIQ Can Help
- Corpus confirmation: determine whether and where the principal (plus household and staff) appear in this dataset and which specific fields are exposed for them.
- Exposure mapping: cross-reference the exposed identifiers against broker-available data to size and prioritize the principal's wider footprint.
- ThreatWatch tuned to this incident's identifiers and misuse pattern (impersonation and targeting patterns, not generic credential monitoring).
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