Security audit

Pans Excel

Security checks for vulnerabilities and agentic risk

Overview

This Excel helper is mostly purpose-aligned, but its bundled script can evaluate spreadsheet data input as Python code, which makes it unsafe without review.

Install only if you trust the publisher and can restrict how commands are invoked. Do not pass untrusted --data values, avoid importing attacker-supplied CSV/JSON without formula sanitization, and be aware that formatting, charting, cleaning, validation, and autofmt commands may overwrite the workbook unless an output path is provided.

A.I.G

Vulnerability Patterns

Insecure Skill Coding PracticesFinds exploitable flaws such as hardcoded secrets or command injection
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

Findings (2)

T09 · Insecure Skill Coding Practices

Error

Location: scripts/excel.py:1772
Finding: Arbitrary Python Code Execution Through Unsafe Data Parsing
Content: View full analysis
/tmp/eval-proof")' \ --output out.xlsx ``` 3. `json.loads()` rejects the value. 4. Execution enters the fallback and evaluates the payload with `eval(s)`. 5. The operating-system command runs w ...[truncated 948 chars]
Remediation: View remediation

T09 · Insecure Skill Coding Practices

Warning

Location: scripts/excel.py:96
Finding: Spreadsheet Formula Injection During CSV and JSON Import
Content: View full analysis
'X': self.new(sheet) headers=list(data.keys()) nr=max((len(v) for v in data.values()),default=0) # 标题 self.ws.merge_cells(f"A1:{get_column_letter(len(headers))}1") c=self.ws["A1"]; c.value=f"📊 {sheet}"; ap(c,ST["title"]); c.fill=fill(C["gray_l"]) # 表头 for col,h in enumerate(headers,1): cell=self.ws.cell(row=3,column=col,value=h); ap(cell,ST["h"]) # 数据 for r in range(nr): bg=C["gray_l"] if r%2==0 else C["white"] for col,h in enumerate(headers,1): val=data[h][r] if r
Remediation: View remediation

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 (56)

Tp4

High

Category: MCP Tool Poisoning
Confidence: 99% confidence
Finding: This mismatch points to undisclosed risky behavior: parsing user data with eval() would permit code execution, and invoking LibreOffice via subprocess introduces shell/external program execution risk. Even though the code is not shown here, a skill description that hides code execution and external process invocation materially increases the danger because users and orchestrators cannot apply informed trust boundaries.
Content: No source excerpt is available for this finding.

Tp4

High

Category: MCP Tool Poisoning
Confidence: 96% confidence
Finding: This mismatch points to undisclosed risky behavior: parsing user data with eval() would permit code execution, and invoking LibreOffice via subprocess introduces shell/external program execution risk. Even though the code is not shown here, a skill description that hides code execution and external process invocation materially increases the danger because users and orchestrators cannot apply informed trust boundaries.
Content: No source excerpt is available for this finding.

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 35)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 42)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 45)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 48)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 51)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 54)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 57)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 63)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 64)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 65)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 66)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 67)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 68)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 69)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 75)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 76)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 77)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 78)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 79)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 80)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 81)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 88)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx

Ae1

High

Category: analysis-evasion
Confidence: 100% confidence
Finding: Referenced artifact was not completely inspected
Content: Scanner excerpt · SKILL.md (reported line 91)May include surrounding context.
md
python3 scripts/excel.py create -d '{"部门":["华东","华南"],"销售额":[125,98],"利润":[31,20]}' -o out.xlsx