hunt-sharepoint
hunt-sharepoint targets on-premises Microsoft SharePoint Server farms (2013 through Subscription Edition) for unauthenticated vulnerabilities including SOAP login bypass, anonymous form digest issuance, and the ToolShell precondition chain (CVE-2025-53770). Use when HTTP responses contain SharePoint headers (SPRequestGuid, X-MS-InvokeApp, X-SharePointHealthScore) or reveal /_layouts/15/, /_vti_bin/, /_api/, or /_catalogs/ paths, especially on end-of-life versions where published CVEs remain permanently unpatched.
git clone --depth 1 https://github.com/elementalsouls/Claude-BugHunter /tmp/hunt-sharepoint && cp -r /tmp/hunt-sharepoint/skills/hunt-sharepoint ~/.claude/skills/hunt-sharepointSKILL.md
## Crown Jewel Targets
SharePoint Server (on-prem) is one of the richest enterprise attack surfaces in 2025-2026 bug bounty / red-team work. Three forces converge:
1. **End-of-life unpatched code paths.** SharePoint Server 2013 reached extended-support EoL on 2023-04-11 (final build `15.0.5545.1000` / KB5002381). Every SharePoint CVE published after that date is **permanently unpatched** on SP2013 farms. SP2016 reaches EoL 2026-07-14; SP2019 reaches EoL 2026-07-14 (next 2 months as of May 2026); only SP Subscription Edition is currently in active support.
2. **CVE-2025-53770 / 53771 "ToolShell"** — July 2025 emergency-out-of-band patch chain for SPE / SP2019 / SP2016. The vulnerable code path (anonymous `/_layouts/15/ToolPane.aspx?DisplayMode=Edit` + anonymous `__REQUESTDIGEST` + unencrypted ViewState) is present in **SP2013 too** and will never receive a fix.
3. **Custom branded login pages forget legacy SOAP login.** `/_vti_bin/Authentication.asmx` with the `Login` SOAP op is the SharePoint equivalent of WordPress XMLRPC bypass — accepts native Forms credentials anonymously with no rate limit on most farms even when the branded UI has lockout.
**Highest-value SharePoint targets:**
- **SP2013 farms still on the public internet** — every CVE since April 2023 is unpatched. Critical-severity findings.
- **Dealer / partner / supplier portals** built on SharePoint by enterprise integrators (German VW group, a enterprise system integrator, etc.) — high-impact business data, often nested inside corporate AD trees.
- **SharePoint farms with anonymous Forms-auth zones** — Authentication.asmx becomes anonymously brute-forceable.
- **SharePoint inside corporate AD parent forests** — NTLM Type-2 leak (see `hunt-ntlm-info`) discloses the parent forest membership.
- **Telerik-integrated SharePoint installations** — additional deserialization sinks on top of SP's own.
**Asset types that pay most:** internet-reachable SP Server (any version) > SP Online with custom solutions hooks > intranet SP only after VPN compromise.
---
## Attack Surface Signals
**Response-header fingerprints (any one is sufficient — usually multiple co-occur):**
```
SPRequestGuid: <GUID> (always — anonymous and authenticated)
X-MS-InvokeApp: 1; RequireReadOnly (SharePoint web request)
X-SharePointHealthScore: 0 (SharePoint specific)
SPIisLatency: <ms> (SharePoint internal timing)
SPRequestDuration: <ms> (SharePoint request duration)
MicrosoftSharePointTeamServices: 15.0.0.0 (often stripped by ELB — but if present, exact version)
X-Forms_Based_Auth_Required: <login URL> (Forms-auth zone indicator)
X-Forms_Based_Auth_Return_Url: <return URL> (Forms-auth zone indicator)
X-MSDAVEXT_Error: 917656; Access denied... (WebDAV extension active)
DAV: 1, 2 (WebDAV verbs supported)
Set-Cookie: ASP.NET_SessionId=... (always — IIS session)
Set-Cookie: FedAuth=...; rtFa=... (claims-mode auth)
Set-Cookie: WSS_FullScreenMode=... (SharePoint UI mode)
```
**URL / path fingerprints:**
```
/_layouts/15/ (SP2013+ layouts root — SP2010 used /_layouts/ without the 15)
/_layouts/14/ (legacy SP2010 — almost EoL since 2020-10-13)
/_layouts/16/ (some SP2019 / SPE)
/_vti_bin/ (FrontPage-RPC + SOAP services)
/_vti_pvt/ (FrontPage-RPC config — usually 403)
/_vti_inf.html (almost always anonymous; contains FPVersion banner)
/_api/ (modern REST API)
/_api/$metadata (OData metadata — often anonymous + large)
/_api/contextinfo (FormDigest issuer — POST only)
/_catalogs/ (site catalogs: masterpage, wp, lt, theme, solutions)
/_catalogs/users/simple.aspx (user list — usually 403)
/_layouts/15/start.aspx (anonymous landing — leaks version)
/_layouts/15/ToolPane.aspx (web part editor — ToolShell sink)
/_layouts/15/Picker.aspx (people/list picker — SafeControl recon)
/_layouts/15/download.aspx (SP-internal file resolver — NOT outbound SSRF)
/_layouts/15/Authenticate.aspx (forms-auth redirector)
/_layouts/15/SignOut.aspx (logout)
/_layouts/15/error.aspx (error page — anonymous)
/_layouts/15/AccessDenied.aspx (denied page — anonymous)
/_layouts/15/scriptresx.ashx?culture=en-us&name=core (resource bundle leak)
/_layouts/15/<Customer>/ (custom-branding modules — see Methodology step 8)
/_vti_bin/Authentication.asmx (THE legacy login bypass — see hunt-auth-bypass Legacy-Protocol Matrix)
/_vti_bin/SharedAccess.asmx (often anon-readable)
/_vti_bin/lists.asmx (auth-required on hardened farms)
/_vti_bin/sites.asmx (auth-required on hardened farms)
/_vti_bin/sts/ (Security Token Service — usually 302 to error)
/sites/<name>/ (site collections)
/personal/<user>/ (MySite / OneDrive-for-Business)
```
**Body signals (in HTML responses):**
```
<meta name="GENERATOR" content="Microsoft SharePoint" />
RegisterSod("...","/_layouts/15/..."); (Script-on-demand registration)
var g_initUrl=''; (start.aspx MDS state)
__REQUESTDIGEST (CSRF token — leaks even to anon if endpoint mis-configured)
__VIEWSTATEENCRYPTED="" (Sign-only ViewState — see hunt-aspnet)
"LibraryVersion":"15.0.X.XXXX" (in _api/contextinfo response)
Version:15, webPermMasks:{High:0,Low: (in start.aspx body)
HelpWindowKey('WSSEndUser_troubleshooting (anonymous error.aspx body)
```
**Tech-stack signals:**
- `Server: Microsoft-IIS/10.0` + paths starting with `/_layouts/15/` → SharePoint 2013/2016/2019/SE
- AWS ELB / ALB inEnd-to-end Android APK red-team pipeline — automated APK acquisition (Play Store + apkpure + apkmirror fallback), jadx decompilation, secret/URL/JWT/Firebase grep, pinned-cert extraction, exported-component enumeration, Frida runtime instrumentation templates, intent-injection probes. Built from an authorized external red-team engagement where 7 APKs were pulled manually, 4 download attempts truncated, and a hardcoded JWT + 30 internal API endpoints were recovered from one of the apps. Use when target has a mobile app catalogue (Play Store developer page), when you find an APK URL hosted on a web server, or when post-recon mentions "mobile app" in scope.
Run autonomous hunt loop on a target — scope check → recon → rank surface → hunt → validate → report with configurable checkpoints. Usage: /autopilot target.com [--paranoid|--normal|--yolo]
Local-tooling companion to the bug-bounty orchestrator — carries the SAME complete bug-bounty workflow, but reach for THIS variant when you also need to resolve where tools, wordlists, and clones are installed on the local machine (jhaddix, SecLists, trufflehog, ffuf, dalfox, ghauri); for pure orchestration/routing use the bug-bounty skill. Workflow it covers — recon (subdomain enumeration, asset discovery, fingerprinting, HackerOne scope, source code audit), pre-hunt learning (disclosed reports, tech stack research, mind maps, threat modeling), vulnerability hunting (IDOR, SSRF, XSS, auth bypass, CSRF, race conditions, SQLi, XXE, file upload, business logic, GraphQL, HTTP smuggling, cache poisoning, OAuth, timing side-channels, OIDC, SSTI, subdomain takeover, cloud misconfig, ATO chains, agentic AI), LLM/AI security testing (chatbot IDOR, prompt injection, indirect injection, ASCII smuggling, exfil channels, RCE via code tools, system prompt extraction, ASI01-ASI10), A-to-B bug chaining (IDOR→auth bypass, SSRF→cloud metadata, XSS→ATO, open redirect→OAuth theft, S3→bundle→secret→OAuth), bypass tables (SSRF IP bypass, open redirect bypass, file upload bypass), language-specific grep (JS prototype pollution, Python pickle, PHP type juggling, Go template.HTML, Ruby YAML.load, Rust unwrap), and reporting (7-Question Gate, 4 validation gates, human-tone writing, templates by vuln class, CVSS 3.1, PoC generation, always-rejected list, conditional chain table, submission checklist). Use when you need the local install path of a tool / wordlist / clone for a hunt, or as the full-workflow variant when operating from this local toolkit; for general routing use the bug-bounty skill. 中文触发词:漏洞赏金、安全测试、渗透测试、漏洞挖掘、信息收集、子域名枚举、XSS测试、SQL注入、SSRF、安全审计、漏洞报告
Use at the START of any bug bounty hunting session, when switching targets, or when feeling lost about what to do next. Master orchestrator that combines the 5-phase non-linear hunting workflow with the critical thinking framework (developer psychology, anomaly detection, What-If experiments). Routes to all other skills based on current hunting phase. Also use when asking "what should I do next" or "where am I in the process.
Complete bug bounty workflow — recon (subdomain enumeration, asset discovery, fingerprinting, HackerOne scope, source code audit), pre-hunt learning (disclosed reports, tech stack research, mind maps, threat modeling), vulnerability hunting (IDOR, SSRF, XSS, auth bypass, CSRF, race conditions, SQLi, XXE, file upload, business logic, GraphQL, HTTP smuggling, cache poisoning, OAuth, timing side-channels, OIDC, SSTI, subdomain takeover, cloud misconfig, ATO chains, agentic AI), LLM/AI security testing (chatbot IDOR, prompt injection, indirect injection, ASCII smuggling, exfil channels, RCE via code tools, system prompt extraction, ASI01-ASI10), A-to-B bug chaining (IDOR→auth bypass, SSRF→cloud metadata, XSS→ATO, open redirect→OAuth theft, S3→bundle→secret→OAuth), bypass tables (SSRF IP bypass, open redirect bypass, file upload bypass), language-specific grep (JS prototype pollution, Python pickle, PHP type juggling, Go template.HTML, Ruby YAML.load, Rust unwrap), and reporting (7-Question Gate, 4 validation gates, human-tone writing, templates by vuln class, CVSS 3.1, PoC generation, always-rejected list, conditional chain table, submission checklist). Use for ANY bug bounty task — starting a new target, doing recon, hunting specific vulns, auditing source code, testing AI features, validating findings, or writing reports. 中文触发词:漏洞赏金、安全测试、渗透测试、漏洞挖掘、信息收集、子域名枚举、XSS测试、SQL注入、SSRF、安全审计、漏洞报告
Bugcrowd-specific reporting tactics complementing report-writing: VRT category search-and-fallback strategy when no exact match exists, manual severity override when VRT defaults underrate impact, severity-request paragraph as first body section, OOS-clause rebuttal templates (rate limiting on auth-flow endpoints, debug-info framing, user-enumeration with sensitive PII, theoretical-issue counter), chained-finding cross-reference patterns, target selection for QA-vs-prod programs, researcher-side hygiene (Bugcrowdninja email alias, account state restoration, friendly-tester posture). Use when filing a Bugcrowd submission, when VRT default seems wrong, when triager closes as OOS or downgrades severity, when chaining linked submissions, or when scope distinguishes production from QA. Pairs with report-writing and triage-validation.
Build an exploit chain — given bug A, finds B and C to combine for higher severity and payout. Knows common chain patterns: IDOR→ATO, SSRF→cloud metadata, XSS→ATO, open redirect→OAuth theft, S3→bundle→secret→OAuth. Usage: /chain
Cloud IAM red-team attack chain across AWS, Azure, GCP — focused on EXTERNAL exploitation paths and post-credential-discovery privilege analysis. Covers IAM enumeration (aws iam, az role, gcloud iam), STS/AssumeRole chaining, Azure Managed Identity abuse (via SSRF/leak), GCP service account JSON abuse, IMDSv1/v2 attacks via SSRF, K8s ServiceAccount token privilege analysis once held (token discovery / cluster exposure is owned by hunt-k8s), role-trust-policy confused-deputy, cross-account assume-role enumeration, IAM privilege escalation patterns (24+ AWS, 8+ Azure, 6+ GCP), and AWS Cognito Identity Pool unauthenticated-role attack chain (GetId → GetCredentialsForIdentity → IAM role abuse). Built for the case where recon yields a credential (key, JSON, token) and you need to know what it grants and how to escalate. Use when an AWS key / Azure secret / GCP service account JSON / K8s SA token surfaces from a code repo, JS bundle, APK, breach corpus, or SSRF chain.