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Security audit

Ahrefs Domain Rating Free

Security checks for vulnerabilities and agentic risk

Overview

This skill is a narrow Ahrefs Domain Rating lookup tool with a disclosed external API call and no evidence of hidden persistence, credential use, or destructive behavior.

Install through ClawHub when possible, or pin/review any npx-based installer before use. Expect user-supplied domains or URLs to be sent to Ahrefs, and avoid checking private or sensitive URLs if that disclosure is not acceptable.

A.I.G

Vulnerability Patterns
  • Insecure DependenciesIntroduces malicious components through unsafe dependency sources
  • 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 (1)

T08 · Insecure Dependencies

Warning
Location
README.md:21
Finding

Unpinned Third-Party Package Execution Through npx

Content
View full analysis
Remediation
View remediation
add AIGC-Hackers/ahrefs-domain-rating-free-skill --skill ahrefs-domain-rating-free ``` 2. Record the approved package version and publisher identity in both `README.md` and `SKILL.md`. 3. Use package-locking and integrity verification where supported. Retain and verify registry integrity hashes for every executable package and transitive dependency. 4. Prefer an installation mechanism that does not download and immediately execute mutable remote code. A locally installed, reviewed, and locked CLI is safer than an unpinned `npx` invocation. 5. Review lifecycle scripts and the complete transitive dependency tree of the pinned package before recommending it. 6. Run installation commands under a non-privileged account in an isolated environment without unrelated credentials or sensitive environment variables. 7. Establish an upgrade process in which new package versions are reviewed and tested before documentation is updated to reference them. ]]>

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (11)

Rp1

Medium
Category
MCP Rug Pull
Confidence
70% confidence
Finding

npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Content

No source excerpt is available for this finding.

Rp1

Medium
Category
MCP Rug Pull
Confidence
70% confidence
Finding

npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Content

No source excerpt is available for this finding.

Rp1

Medium
Category
MCP Rug Pull
Confidence
70% confidence
Finding

npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Content

No source excerpt is available for this finding.

Rp1

Medium
Category
MCP Rug Pull
Confidence
70% confidence
Finding

npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Content

No source excerpt is available for this finding.

Rp1

Medium
Category
MCP Rug Pull
Confidence
70% confidence
Finding

npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Content

No source excerpt is available for this finding.

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
95% confidence
Finding

The skill instructs the agent to make outbound network requests but does not declare an explicit tool scope such as permissions or allowed-tools. That weakens least-privilege controls and can let a host agent invoke network-capable tooling without clear policy boundaries or user-visible authorization expectations.

Content

No source excerpt is available for this finding.

Rp1

Medium
Category
MCP Rug Pull
Confidence
87% confidence
Finding

Using npx skills without pinning a specific version introduces supply-chain risk because the resolved package can change over time or be replaced by a malicious release. Anyone installing the skill later may execute unexpected code during bootstrap, outside the narrow Ahrefs functionality described in the skill.

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 · README.md (reported line 7)May include surrounding context.

md
import urllib.request
from typing import Any

ENDPOINT = "https://api.ahrefs.com/v3/public/domain-rating-free"
USER_AGENT = "ahrefs-domain-rating-free-skill/1.0 (+https://github.com/AIGC-Hackers/ahrefs-domain-rating-free-skill)"

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 · SKILL.md (reported line 15)May include surrounding context.

md
import urllib.request
from typing import Any

ENDPOINT = "https://api.ahrefs.com/v3/public/domain-rating-free"
USER_AGENT = "ahrefs-domain-rating-free-skill/1.0 (+https://github.com/AIGC-Hackers/ahrefs-domain-rating-free-skill)"

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 · scripts/ahrefs-domain-rating-free.py (reported line 17)May include surrounding context.

python
import urllib.request
from typing import Any

ENDPOINT = "https://api.ahrefs.com/v3/public/domain-rating-free"
USER_AGENT = "ahrefs-domain-rating-free-skill/1.0 (+https://github.com/AIGC-Hackers/ahrefs-domain-rating-free-skill)"

Scope Creep

Low
Category
Excessive Agency
Confidence
70% confidence
Finding

Skill's behavior or capabilities extend beyond its stated purpose. Scope creep allows an agent to perform actions unrelated to its documented functionality, increasing the attack surface.

Content

Scanner excerpt · LICENSE (reported line 12)May include surrounding context.

text
permit persons to whom the Software is furnished to do so.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

Static analysis

No suspicious patterns detected.