Sierra Club

Sierra Club reported a data breach occurring on 02/09/2023, discovered on 05/09/2023, involving insider wrongdoing. The incident affected 813 individuals, including 10 Maine residents. Social Security Numbers were compromised. The organization provided written notification on 10/04/2023 and offered 12 months of credit monitoring through Experian.

Sierra Club notified consumers of an insider incident where a former employee forwarded a file containing names and Social Security numbers of certain employees to a personal email account on February 3, 2023. The incident was discovered during a security audit. The employee was terminated. Sierra Club offered 12 months of credit monitoring via Experian.

Sierra Club notified New Hampshire residents on October 4, 2023, regarding a data incident involving a former employee. On or about February 3, 2023, the employee forwarded or blind-copied a file containing personal information of other Sierra Club employees to a personal email account. The activity was discovered during a security audit. The employee is no longer with the organization. Two New Hampshire residents were notified. Credit monitoring services were provided via Experian.

Sierra Club reported a data breach to the Montana Attorney General. The breach was reported on 2023-10-05. The breach occurred on 2/3/2023. 8 Montana residents were affected.