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Security audit

tax-season-organizer

Security checks for vulnerabilities and agentic risk

Overview

The promised checks miss exposed identifiers and missing tax forms, so a clean report can give false reassurance about sensitive records.

Treat this as Review before handling sensitive records. Use redacted inputs and independently check missing forms, identifiers, and masking; neither 'No flags' nor mask_identifiers: true confirms safety. The optional Windows application is unnecessary for the local workflow and requires separate assessment.

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
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The reported failure to detect identifiers and missing W-9s undermines a compliance safeguard that users are explicitly instructed to run. In a workflow handling SSNs, ITINs, and tax records, false-negative results could encourage sharing unmasked identifiers or overlooking compliance issues; missing checklist-generation features alone would be a functionality defect rather than a security vulnerability. This assessment relies on the static analyzer's implementation claims because the script itself was not supplied.

Content

No source excerpt is available for this finding.

Skill declares no tool scope ('permissions' or 'allowed-tools') but code capabilities were detected: file_write.

Medium
Category
MCP Least Privilege
Confidence
70% confidence
Finding

Without declared permissions the skill's intent is opaque and cannot be validated.

Content

No source excerpt is available for this finding.

The promised missing-W-9 and taxpayer-ID flagging is ineffective because regex rules are matched as literal text.

Medium
Category
Excessive Agency
Confidence
99% confidence
Finding

The script checks whether each regex pattern appears literally in the input rather than evaluating it, so ordinary missing-W-9 notices, unresolved taxpayer IDs, overdue 1099s, and full SSNs will not trigger their intended flags. In a tax-document workflow, the resulting 'No flags' report can create false reassurance and allow compliance issues or exposed sensitive identifiers to pass unnoticed, although this script does not itself file returns or transmit data.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.