fix(#201): Enhance WikiLink XSS protection with comprehensive validation
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Added defense-in-depth security layers for wiki-link rendering:

Slug Validation (isValidWikiLinkSlug):
- Reject empty slugs
- Block dangerous protocols: javascript:, data:, vbscript:, file:, about:, blob:
- Block URL-encoded dangerous protocols (e.g., %6A%61%76%61... = javascript)
- Block HTML tags in slugs
- Block HTML entities in slugs
- Only allow safe characters: a-z, A-Z, 0-9, -, _, ., /

Display Text Sanitization (DOMPurify):
- Strip all HTML tags from display text
- ALLOWED_TAGS: [] (no HTML allowed)
- KEEP_CONTENT: true (preserves text content)
- Prevents event handler injection
- Prevents iframe/object/embed injection

Comprehensive XSS Testing:
- 11 new attack vector tests
- javascript: URLs - blocked
- data: URLs - blocked
- vbscript: URLs - blocked
- Event handlers (onerror, onclick) - removed
- iframe/object/embed - removed
- SVG with scripts - removed
- HTML entity bypass - blocked
- URL-encoded protocols - blocked
- All 25 tests passing (14 existing + 11 new)

Files modified:
- apps/web/src/components/knowledge/WikiLinkRenderer.tsx
- apps/web/src/components/knowledge/__tests__/WikiLinkRenderer.test.tsx

Fixes #201

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit is contained in:
2026-02-03 22:59:41 -06:00
parent db23486e9e
commit e57271c278
12 changed files with 466 additions and 6 deletions

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# QA Remediation Report
**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/components/knowledge/WikiLinkRenderer.tsx
**Tool Used:** Edit
**Epic:** general
**Iteration:** 1
**Generated:** 2026-02-03 22:57:25
## Status
Pending QA validation
## Next Steps
This report was created by the QA automation hook.
To process this report, run:
```bash
claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-components-knowledge-WikiLinkRenderer.tsx_20260203-2257_1_remediation_needed.md"
```

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# QA Remediation Report
**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/components/knowledge/WikiLinkRenderer.tsx
**Tool Used:** Edit
**Epic:** general
**Iteration:** 2
**Generated:** 2026-02-03 22:57:44
## Status
Pending QA validation
## Next Steps
This report was created by the QA automation hook.
To process this report, run:
```bash
claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-components-knowledge-WikiLinkRenderer.tsx_20260203-2257_2_remediation_needed.md"
```

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# QA Remediation Report
**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/components/knowledge/**tests**/WikiLinkRenderer.test.tsx
**Tool Used:** Edit
**Epic:** general
**Iteration:** 1
**Generated:** 2026-02-03 22:57:12
## Status
Pending QA validation
## Next Steps
This report was created by the QA automation hook.
To process this report, run:
```bash
claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-components-knowledge-__tests__-WikiLinkRenderer.test.tsx_20260203-2257_1_remediation_needed.md"
```

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# QA Remediation Report
**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/components/knowledge/**tests**/WikiLinkRenderer.test.tsx
**Tool Used:** Edit
**Epic:** general
**Iteration:** 1
**Generated:** 2026-02-03 22:58:04
## Status
Pending QA validation
## Next Steps
This report was created by the QA automation hook.
To process this report, run:
```bash
claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-components-knowledge-__tests__-WikiLinkRenderer.test.tsx_20260203-2258_1_remediation_needed.md"
```

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@@ -0,0 +1,20 @@
# QA Remediation Report
**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/components/knowledge/**tests**/WikiLinkRenderer.test.tsx
**Tool Used:** Edit
**Epic:** general
**Iteration:** 2
**Generated:** 2026-02-03 22:58:10
## Status
Pending QA validation
## Next Steps
This report was created by the QA automation hook.
To process this report, run:
```bash
claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-components-knowledge-__tests__-WikiLinkRenderer.test.tsx_20260203-2258_2_remediation_needed.md"
```

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@@ -0,0 +1,20 @@
# QA Remediation Report
**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/components/knowledge/**tests**/WikiLinkRenderer.test.tsx
**Tool Used:** Edit
**Epic:** general
**Iteration:** 3
**Generated:** 2026-02-03 22:58:17
## Status
Pending QA validation
## Next Steps
This report was created by the QA automation hook.
To process this report, run:
```bash
claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-components-knowledge-__tests__-WikiLinkRenderer.test.tsx_20260203-2258_3_remediation_needed.md"
```

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@@ -0,0 +1,20 @@
# QA Remediation Report
**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/components/knowledge/**tests**/WikiLinkRenderer.test.tsx
**Tool Used:** Edit
**Epic:** general
**Iteration:** 4
**Generated:** 2026-02-03 22:58:27
## Status
Pending QA validation
## Next Steps
This report was created by the QA automation hook.
To process this report, run:
```bash
claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-components-knowledge-__tests__-WikiLinkRenderer.test.tsx_20260203-2258_4_remediation_needed.md"
```

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@@ -0,0 +1,20 @@
# QA Remediation Report
**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/components/knowledge/**tests**/WikiLinkRenderer.test.tsx
**Tool Used:** Edit
**Epic:** general
**Iteration:** 5
**Generated:** 2026-02-03 22:58:44
## Status
Pending QA validation
## Next Steps
This report was created by the QA automation hook.
To process this report, run:
```bash
claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-components-knowledge-__tests__-WikiLinkRenderer.test.tsx_20260203-2258_5_remediation_needed.md"
```

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@@ -0,0 +1,20 @@
# QA Remediation Report
**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/components/knowledge/**tests**/WikiLinkRenderer.test.tsx
**Tool Used:** Edit
**Epic:** general
**Iteration:** 1
**Generated:** 2026-02-03 22:59:06
## Status
Pending QA validation
## Next Steps
This report was created by the QA automation hook.
To process this report, run:
```bash
claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-components-knowledge-__tests__-WikiLinkRenderer.test.tsx_20260203-2259_1_remediation_needed.md"
```