DisclosureLens
HackingEducationEducationStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedIdentity (basic)Government IDMediumContained

Mount Mansfield Unified Union School District

bd_d4798df32f751c4d · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 28, 2024

Filed

Feb 6, 2025

To disclose

6 weeks

Affected

Not disclosed

Confidence

67%
Full breach record for Mount Mansfield Unified Union School District →

Mount Mansfield Unified Union School District notified Vermont AG that PowerSchool experienced a security event between Dec 19-28, 2024. An unknown actor accessed and downloaded student and teacher data, including names and Social Security numbers. The District investigated, offered 24 months of credit monitoring via Experian, and is reviewing internal policies.

Vermont clock⏱ VT AG >14 bday6 weeks discovery → filing
⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 9 days
discovery → filing · 6 weeks / 40 days

Dec 19, 2024

Begins

Dec 28, 2024

Discovered

Feb 6, 2025

Filed

vs. sector median

3 wks faster

Part of PowerSchool supply-chain incident (2025) — a supply-chain cascade affecting multiple organizations.View cascade →
Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.