Security audit

Muslim Holiday Calendar

Security checks for vulnerabilities and agentic risk

Overview

This is a simple local holiday lookup, but it advertises Hijri conversion and Ashura support that the code does not provide.

Install only if you are comfortable treating this as an incomplete static lookup for a few Islamic holidays from 2024-2030. Do not rely on it for Hijri conversion, Ashura dates, or important observance planning without checking a trusted calendar source.

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 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
Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code

Findings (3)

Tp4

High

Category: MCP Tool Poisoning
Confidence: 96% confidence
Finding: The skill’s documentation materially overstates its capabilities by claiming Hijri/Gregorian conversion and support for holidays like Ashura that are not actually implemented, while presenting itself as a general Islamic holiday calendar. In a date- and religion-sensitive context, users may rely on incorrect or incomplete information for observance, planning, or reminders, creating trust and integrity risks even though this is not direct code execution or data exfiltration.
Content: No source excerpt is available for this finding.

Description-Behavior Mismatch

Medium

Category: Not specified by scanner
Confidence: 95% confidence
Finding: The manifest describes an Islamic holiday calendar and Hijri date converter, but this file contains no Hijri calendar conversion logic in either direction. Instead, it exposes hardcoded Gregorian holiday dates for 2024-2030 plus simple utilities like next-holiday lookup, countdown, and Friday detection.
Content: No source excerpt is available for this finding.

Description-Behavior Mismatch

Low

Category: Not specified by scanner
Confidence: 87% confidence
Finding: The manifest specifically cites Ashura among supported holidays, yet neither the holiday date table nor the holiday metadata includes an Ashura entry. This creates a user-facing mismatch between claimed coverage and actual supported holidays.
Content: No source excerpt is available for this finding.