Dear Amplitude Customers,
In April 2018, we informed our customer-base about an issue where, under a specific set of circumstances that were tied to the local browsing environment, use of a version of the JavaScript SDK older than 4.1.1 may result in some data contamination across Amplitude customer organization boundaries. The original bulletin is included below for your reference.
Once we discovered and verified this issue, we added a control in JS SDK 4.1.1 that has shown itself to be effective in mitigating this scenario, even as Amplitude cannot control it directly.
Many of our customers have updated the Amplitude JS SDK version in their applications. Unfortunately, some customers have yet to do so. As a result, we have concluded that it is appropriate at this time to deprecate all older versions of the JS SDK that lack this mitigation. As such, Amplitude will deprecate all versions of the JS SDK older than 4.1.1 on January 31, 2019, and beginning February 1, 2019, Amplitude will no longer support those versions of the JS SDK. This means that on February 1, 2019 we will stop collecting data from JS SDKs older than 4.1.1.
We will send additional reminders as the deadline approach. Please make sure to update your JS SDK version as soon as possible but no later than January 31, 2019 in order to avoid loss of service once support for the versions of the JS SDK older than 4.1.1 is turned off in the platform. You can find the latest version of our JS SDK here.
We appreciate your cooperation as we continue to improve data security. If you have any questions please reach out to your CSM or to support@amplitude.com
Thank You,
Alan Ibrahim
Sr. Director of Customer Success