AccidentalTechnologyInformationPublishing ErrorCustomer Data InvolvedIdentity (basic)LowResolved

MetaBrainz Foundation

bd_1608376468dbdef4 · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 22, 2020

Filed

Dec 1, 2020

To disclose

9 days

Affected

Not disclosed

Confidence

70%

Full breach record for MetaBrainz Foundation →

MetaBrainz Foundation Inc. disclosed that email addresses and dates of birth were exposed in the JSON source code of MusicBrainz entity pages between April 26, 2019, and November 22, 2020. The data was not visible in the rendered page but was accessible via 'view source'. The organization fixed the code, audited for other leaks, and implemented additional checks. No passwords were compromised. The filing notes uncertainty regarding the number of California residents affected.

J jump to incidentP pin to compareR raw source

California clockDiscovered Nov 22, 2020 → Notified Nov 23, 20201d ✓ CA 60-day OK9 days discovery → filing

Incident timeline

undetected · 576 days

discovery → filing · 9 days

Apr 26, 2019

Begins

Nov 22, 2020

Discovered

Dec 1, 2020

Filed

vs. sector median

17 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: MetaBrainz Foundation
norm: metabrainz foundation
Domain: metabrainz.org

Name: MetaBrainz Foundation
norm: metabrainz foundation
Domain: metabrainz.org
Industry: Technologyllm

Discovered: Nov 22, 2020
Breach occurred: Apr 26, 2019 – Nov 22, 2020
Undetected for: 576 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 23, 2020
Affected individuals: Not disclosed
Data types: Identity (basic)
Attack vector: Misconfiguration
Regulator citations: Notified the state of California about this breach

During the incident: Fixed the breaching code as soon as we found it
Audited all of our code to make sure this was the only place where a leak was happening
Adding additional checks that will warn us if any private user data can be found on the source for a MusicBrainz page again
Changes made: Adding additional checks that will warn us if any private user data can be found on the source for a MusicBrainz page again
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 days(9 days from discovery to filing)
Compliance flags: CA 60-day OK · 1d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Nov 22, 2020
→ Notified: Nov 23, 2020
1d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Nov 22, 2020 → Notified: Nov 23, 2020	1d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

Status: No extraction artifact recorded for this disclosure.

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.

Source URL: https://oag.ca.gov/ecrime/databreach/reports/sb24-196624
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 1, 2020
Raw hash: f38a9ed0a3ba0df301cfb20c2977e22bc0aad11b3c997280a2b6e04e14d60744

Reporting entityMetaBrainz Foundation

Victim entityMetaBrainz Foundation

Incidentdiscovered Nov 22, 2020

Stated responseFixed the breaching code as soon as we found it

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov