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Security audit

xinjianxue-bazi

Security checks for vulnerabilities and agentic risk

Overview

This paid astrology skill uses a documented birth-chart service, discloses its fee, and provides user control over payment.

Use this skill only if you are comfortable sending the supplied birth details to api.xinjianxue.com, including before deciding whether to pay. Retention practices are unspecified. Expect ¥6 per delivered chart, review payment details, and obtain the separate payment capability through Alipay’s official channel.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (6)

The workflow sends personal birth information to an external service without a privacy warning.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The workflow collects precise birth date and time, sex, and birthplace, then directs the agent to send those details to a service without requiring disclosure of the recipient or informed user approval. Together, these attributes can aid identification or profiling, making undisclosed third-party processing a privacy risk. External calculation is consistent with the skill’s purpose, reducing suspicion of malicious intent, but the referenced API documentation is not provided, so the recipient and its data-handling protections cannot be verified.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · references/api.md (reported line 3)May include surrounding context.

md
# 接口契约

- 地址：`https://api.xinjianxue.com/api/xinjianxue/aipay/bazi`
- 方法：POST，`Content-Type: application/json`
- 单价：6 元/次
- 鉴权：只认 `Payment-Proof`，不需要账号、密码或登录态

The request workflow sends personal birth details to an external API without a privacy disclosure.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The workflow directs the agent to submit exact birth date, birth time, gender, and birthplace to an external service without first requiring a privacy disclosure or informed authorization for that transfer. These details are relevant to astrology, which makes the request functionally expected, but their combination can identify or profile a person; the initial submission occurs before the payment interaction provides an opportunity to decline.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · references/payment.md (reported line 8)May include surrounding context.

1. 发起请求

bash
curl -sS -D - -X POST "https://api.xinjianxue.com/api/xinjianxue/aipay/bazi" \
  -H "Content-Type: application/json" \
  -d '{"year":1995,"month":8,"day":4,"h":5,"m":52,"gender":"男","birth_place":"浙江杭州","country":"CN"}'

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · references/payment.md (reported line 8)May include surrounding context.

1. 发起请求

bash
curl -sS -D - -X POST "https://api.xinjianxue.com/api/xinjianxue/aipay/bazi" \
  -H "Content-Type: application/json" \
  -d '{"year":1995,"month":8,"day":4,"h":5,"m":52,"gender":"男","birth_place":"浙江杭州","country":"CN"}'

The skill introduces a mandatory paid-service workflow that is not disclosed in its astrology-focused manifest.

Medium
Category
Excessive Agency
Confidence
90% confidence
Finding

The manifest describes generating and interpreting birth charts, but L03 sets a price of 6 yuan per delivery, and L41–L53 direct a buyer-side Alipay payment and payment-proof retry. L59–L60 make payment a prerequisite for delivering an interpretation, introducing a financial transaction requirement beyond the stated calculation and interpretation scope.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.