Adpost
Disclosed Oct 7, 202511 months ago3,339,512 accountsConfirmed
In February 2025, data obtained from an earlier Adpost breach surfaced. The dataset contained 3.3M records including email addresses, usernames, and display names. Adpost later published a disclosure notice and advised they'd forced a credential refresh, among other actions.
What is known
| People affected | 3,339,512 (accounts in the leaked data, per Have I Been Pwned) |
|---|---|
| Disclosed | Oct 7, 2025 |
| Happened | Feb 14, 2025 |
| Attack | Not stated |
| Data exposed | Emails, Names |
| Sector | Tech |
| Status | Confirmed |
| Check your email | Have I Been Pwned |
Sources
| Source | |
|---|---|
| Have I Been Pwned: Adposthaveibeenpwned.com · Aggregator | Aggregator |
| Adpost disclosureadpost.com · The organization | The organization |
Notices filed
| Where | Filed | People |
|---|---|---|
| Have I Been Pwnedaccounts in the data | Oct 7, 2025 | 3,339,512 |
History of this record
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (Have I Been Pwned), confirmed by Company page. Record counts are as reported. Not legal advice.