JS Reverse MCP
An MCP server for JavaScript reverse engineering that enables AI to perform browser debugging, script analysis, and automated hook injection. It streamlines complex workflows like deobfuscation, network tracing, and risk assessment through direct browser integration.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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Source: Glama
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Install from
The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
sm-crypto: Predictable SM2 key generation in Node.js: default RNG uses Math.random + wall clock
axios Vulnerable to Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`
Allocation of Resources Without Limits or Throttling in Axios
Axios Node HTTP adapter can use an inherited proxy after interceptor config cloning
Axios: Regular Expression Denial of Service (ReDoS) via Cookie Name Injection
ANTHROPIC_API_KEYANTHROPIC_BASE_URLANTHROPIC_MODELBROWSER_CHANNELBROWSER_EXECUTABLE_PATHBROWSER_HEADLESSBROWSER_ISOLATEDDEFAULT_LLM_PROVIDER决定默认走哪个 providerGEMINI_API_KEYgemini 支持两种模式：有 时走 API；没有时会尝试走 GEMINI_CLI_PATHGEMINI_CLI_PATHgemini 支持两种模式：有 GEMINI_API_KEY 时走 API；没有时会尝试走GEMINI_MODELJSREVERSER_ARTIFACTS_DIRLOG_LEVELOPENAI_API_KEYOPENAI_BASE_URLOPENAI_MODELREMOTE_DEBUGGING_PORTREMOTE_DEBUGGING_URLUSE_STEALTH_SCRIPTSXDG_STATE_HOMEDependencies
20 runtime dependencies (28 dev), 3 flagged: puppeteer-core, puppeteer-extra, puppeteer-extra-plugin-stealth
All four hints declared on every tool
110/110 tools missing one or more hints — recommend_next_step (missing: destructiveHint, idempotentHint, openWorldHint); explain_reverse_stage (missing: destructiveHint, idempotentHint, openWorldHint); run_reverse_agent (missing: destructiveHint, idempotentHint, openWorldHint), +107 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool test coverage
67/110 tools referenced in tests (61%)
Write tests that reference each tool by name so every tool has at least one test.
No eval / new Function
8 eval() or new Function() calls — dynamic code execution
Replace eval / Function with explicit parsing or safer alternatives.
Production dependencies are patched
1 critical, 7 high severity in production deps — sm-crypto@0.4.0 (critical), axios@1.15.2 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Dependency freshness
3/20 production deps abandoned (no release in 2+ years): puppeteer-extra@2023-03-01 (3.5y), puppeteer-extra-plugin-stealth@2023-04-11 (3.4y), xbogus@2023-12-23 (2.7y)
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