dceaf82934
Full-codebase-audit 2026-05-30 outputs: - Audit report: 09 - Audits/Full Codebase Audit - 2026-05-30.md - 81 issue files ISSUE-055..135 (decisions + 1 skipped no-brainer). - Scanner docs from scratch (was zero): architecture, data model, API ref, payment flow, operations runbook + repo README. - Doc-sync updates across API reference, data models, flows, design system. - Secret Rotation Runbook (08 - Operations) for the exposed credentials. - Reusable workflow guide (07 - Development) + .claude/workflows/full-codebase-audit.js. Issues remain status:open intentionally — the code fixes are uncommitted-then-committed working-tree changes per repo and aren't "resolved" until merged/deployed. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
39 lines
1.1 KiB
Markdown
39 lines
1.1 KiB
Markdown
---
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issue: 094
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title: "Backend: selectOffer does not verify buyer owns the purchase request"
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severity: medium
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domain: Marketplace
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labels: [security, backend, idor]
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status: open
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created: 2026-05-30
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source: Full Codebase Audit 2026-05-30
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---
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# Backend: selectOffer does not verify buyer owns the purchase request
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**Severity:** medium
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**Domain:** Marketplace
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**Labels:** security, backend, idor
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## Description
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`src/services/marketplace/marketplaceController.ts:1029` handles `selectOffer` without checking that `req.user.id` matches the `purchaseRequest.buyerId`. Any authenticated user who knows the purchase request ID can select an offer on someone else's request.
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## Options
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1. Reject when `req.user.id !== purchaseRequest.buyerId`.
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2. Allow buyer-owner or admin only.
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3. Atomic `findOneAndUpdate` scoped by `buyerId`.
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## Recommendation
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Enforce `req.user.id === purchaseRequest.buyerId` (admin override allowed). This changes who can accept offers.
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## Affected Files
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- `backend/src/services/marketplace/marketplaceController.ts:1029`
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## References
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- [Full Codebase Audit 2026-05-30](../09%20-%20Audits/Full%20Codebase%20Audit%20-%202026-05-30.md) — DEC-28
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