What is mobile-network-security?

A mobile-app network security check for Android and iOS communication. It looks at whether app traffic uses encrypted connections and whether servers' certificates are properly checked.

Use it to review Android and iOS network settings, certificate validation, hostname checks, WebView error handling, and supported TLS versions and ciphers.

It helps find traffic that attackers could read or alter, such as cleartext HTTP or TLS checks that accept any certificate. It also highlights unsafe certificate-pinning and platform exceptions.

mobile-network-security — Skill by SecurityTalent/bugskill-ai

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add SecurityTalent/bugskill-ai --skill mobile-network-security

Clone the repo

git clone --depth 1 https://github.com/SecurityTalent/bugskill-ai

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/mobile-network-security/github.svg)](https://agentmods.dev/skills/securitytalent/bugskill-ai/mobile-network-security)

Your own site

<a href="https://agentmods.dev/skills/securitytalent/bugskill-ai/mobile-network-security"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/mobile-network-security/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/securitytalent/bugskill-ai/mobile-network-security"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/mobile-network-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 136 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,014 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00136	$0.02014
Opus 5.5	$0.00054	$0.00806
Sonnet 5.5	$0.00027	$0.00403
Haiku 4.5	$0.00014	$0.00201

Measured 20d ago against content hash e5b59496e241, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mobile-network-security scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 20d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Awesome-Claude-Code-Agent-Skills/07-Mobile-and-Smart-Contracts/mobile-network-security/SKILL.md · 153 lines

How it starts

The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mobile Network Security

What Is Broken and Why

Mobile apps fail network security when they allow cleartext HTTP traffic, disable TLS certificate validation, or implement certificate pinning incorrectly. Custom X509TrustManager implementations that accept all certificates (empty checkServerTrusted) are a common developer shortcut that makes the entire TLS layer useless. ATS exceptions in iOS Info.plist or Android Network Security Configuration that allow arbitrary cleartext expose all traffic to MITM. Apps that call onReceivedSslError().proceed() in WebViewClient bypass all certificate errors. Certificate pinning without key backup pins causes production outages, so developers remove pinning — leaving no protection.

Key Signals

Android: android:networkSecurityConfig pointing to XML with <domain-config cleartextTrafficPermitted="true">
Android: android:usesCleartextTraffic="true" in manifest
iOS: NSAllowsArbitraryLoads: true in Info.plist ATS section
Custom X509TrustManager with empty checkServerTrusted() method body
HostnameVerifier returning true for all hosts: ALLOW_ALL_HOSTNAME_VERIFIER
SSLContext.init(null, arrayOf(trustAllManager), null)
WebViewClient onReceivedSslError calling handler.proceed()
TLS 1.0/1.1 explicitly enabled via SSLParameters.setProtocols()
No pin-set in Network Security Configuration for sensitive domains
iOS NSURLSessionDelegate returning no error for invalid certificates
URLSession.shared with no custom delegate (no pinning) for high-value endpoints

Methodology

Setup MITM proxy:

Install Burp/mitmproxy CA cert on device (Android: Settings > Security; iOS: Settings > General > VPN & Device Management)
Configure device proxy to point at Burp listener
Launch app — observe if traffic appears in proxy (cleartext) or throws certificate errors (pinning)

Android static analysis:

apktool d app.apk — check AndroidManifest.xml for usesCleartextTraffic, networkSecurityConfig
Review res/xml/network_security_config.xml for cleartext rules and pin-set presence
Search decompiled source for TrustManager, HostnameVerifier, ALLOW_ALL, onReceivedSslError
Search for SSLContext.init, HttpsURLConnection.setDefaultHostnameVerifier
Check OkHttp client config: OkHttpClient.Builder() for custom sslSocketFactory

Read the full file on GitHub · 153 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

20d ago First seen · 153 lines · 136 tokens per session scan A e5b59496e241

Subscribe to this mod's changes

mobile-network-security is a skill published in the GitHub repository SecurityTalent/bugskill-ai (13 stars, last pushed 21d ago), licensed MIT. It adds 136 tokens to every session and 2,014 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-27.

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