Plan
active
Polymarket loses $2.7M after third-party DebugBear script hijacked
- Engineer — Plan: Classic Magecart-style supply-chain attack via a third-party page-speed script with access to authenticated sessions. Audit all third-party JavaScript loaded on authenticated pages, enforce Subresource Integrity (SRI) hashes, and review the scope/access of analytics and monitoring scripts this quarter.
- SOC/IR — Learn: No IOCs, no ATT&CK mappings, and no detection specifics are provided; the technique (hijacked third-party JS draining authenticated user sessions) is worth cataloguing for future coverage of client-side supply-chain detections, but nothing actionable is available here.
- Leader — Plan: A single compromised monitoring vendor script caused $2.7M in direct financial losses across 726 users — a concrete data point for third-party vendor risk discussions. Schedule a review of client-side script vendors that load into authenticated user sessions and confirm your vendor contracts address incident notification obligations.
This entry was curated and judged by AI (Claude) with automated enrichment
(CISA KEV / EPSS / public PoC). Verify against the original source before
acting. Found a bad verdict?
Report it —
confirmed errors go to the corrections log.