[Home](../) › [Blog](../blog) › Security Notice: Data Leak Affecting a Limited Number of Accounts # Security Notice: Data Leak Affecting a Limited Number of Accounts > Published: 2025-09-07 · Author: Gaël Fraiteur · Canonical: https://postsharp.net/blog/2025-09-09-security-notice We regret to inform you of a data leak that occurred on the **PostSharp Customer Portal** between **Wednesday, September 3rd, and Tuesday, September 9th**. ### Who is affected? A total of **38 customer accounts** were impacted. If your account was affected, you will: 1. Receive a personal notification email within the next 24 hours. 2. Notice that you can no longer sign in to the portal using your license keys. ### What data was leaked? Only the content of the page of the portal was exposed, including: * Company name and billing address (or customer name and address for natural persons) * All subscription dates, number of users, licensed products, and support level * All license keys for PostSharp and Metalama ### What was *not* leaked? * Contact lists or email addresses * Prices, invoices, or quotes * Support tickets * Source code (never uploaded to our servers) ### Who accessed the data? At most, **one other PostSharp customer** may have received your data in error. ### How did this happen? A **caching error** occurred in the daily job that sends subscription renewal notifications, causing account data to be sent to the wrong recipient. The first customer of the batch received all emails. ### Timeline of events * **Wed 9/3, 11:00 AM** – First incorrect email sent. * **Mon 9/8, 8:00 PM** – Data leak reported by the receiving customer. * **Tue 9/9, 2:00 PM** – Report read and incident confirmed. * **Tue 9/9, 4:30 PM** – Credentials invalidated and issue remediated. ### How we fixed it? * All past **magic URLs** were invalidated by rotating the salt for each affected account. * License keys exposed in the leak were **disabled for authentication** to the portal. * The caching bug was fixed. ### Do you need to take action? * **No action is required**. Your license keys will continue to work normally with PostSharp and Metalama products. * If you prefer, we can issue **new license keys** on request, to ensure that any leaked key cannot be used by another party. ### How to log in now? If your license keys no longer work for portal login: * Use **email authentication** (one-time PIN or magic link) for one of your account contacts. * If you do not know your contact, please write to **[hello@postsharp.net](mailto:hello@postsharp.net)** from your work email. We take full responsibility for this incident and sincerely apologize for the error. We are committed to ensuring it does not happen again. --- ## Site navigation - Index of the whole site: [llms.txt](../llms.txt)