Chambersburg Area School District — August 2023 breach
Clustered 7 filings across 6 jurisdictions · filing window Sep 7, 2023 → Oct 26, 2023. View entity profile → Other incidents for this victim →
incident inc_102c5890b2c34470 · merged by deterministic · confidence 100%
Litigation Timing
Discovered → first regulatory filing
Range of discovered_at dates across filings
Days between the first leak-site claim and the first regulatory filing. Positive = the claim came first (public exposure before disclosure). Negative = the claim trailed the filing, so there was no pre-disclosure leak. Counts regulatory filings only — press coverage is not a regulatory disclosure.
Time between earliest and latest filing
Not recorded for this incident
Materiality delta · SEC filing delay — no SEC 8-K in this cluster.
Sensitive data
identity_governmentIncident timeline
Dashed segments are unestablished, not zero — they fill in as filings merge into this incident.
Member cascade — every filing about this breach
- SEP 7Leak siteblackbyte postfirst filing · attacker claim · unverifiedoperator-confirmedday 0
- OCT 26ME AGME AG noticestates nationwide total 4,265operator-confirmed+49d
- OCT 26NH AGNH AG notice1 NH residentsauto-linked+49d
- OCT 26IN AGIN AG noticestates nationwide total 4,265auto-linked+49d
- OCT 26VT AGVT AG noticeno count statedauto-linked+49d
- OCT 26MA AGMA AG noticemost recent · 3 MA residentsoperator-confirmed+49d
- Watching for additional filings — new sources merge into this incident automatically.
Roll-up facts — reconciled across members
- Breach window
- Aug 21, 2023 – Aug 26, 2023 ME AG
- Discovered
- Aug 27, 2023NH AG + VT AGOct 4, 2023ME AGfilings disagree on discovery
- Data types
- Financial account · Identity (basic) · Government ID ME AG + NH AG + VT AG +1
- Attack vector
- Unauthorized Access ME AG
Each fact cites the member filing that establishes it; when filings conflict, every value shows with its source.
Count reconciliation
per-state reported counts
Nationwide (stated in a filing)
4,265
Sum of filed state slices
8· 0.2% of stated
100% of the stated total lives in states whose filings carry no count — the dashed share shrinks as filings land.
State AGs report only their own residents; teal bars show each state's reported slice. The gray US row is the nationwide total reported in a linked filing.
Evidence ladder — rungs this incident occupies
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
No SEC filing or victim statement yet.
Merge provenance
- Method
- deterministic
- Confidence
- 1.00 · above the 0.85 auto-merge floor
- Reviewed
- operator-reviewed Aug 22, 2026 · at least one link edge was human-adjudicated
- Audit
- Every link edge records its method, confidence and model + prompt versions (100% is the strongest edge).
Merges are reversible — a wrong link can be detached with its audit trail intact. How merging works.
Filing velocity
Spread
60 days
Cadence
~1 / 10d
vs. multi-state median
6.7× slower
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. This page states only what the linked filings agree on; each filing's own account stays on its own record, linked from the timeline below.
The weekly clock on records like this one
The Disclosure Clock is a weekly briefing on what landed in the disclosure record, and the gap between the criminals' post and the regulator's filing — measured on the whole record, with the method shown.
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