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SECURITY REPORT · EXTENSHI SCAN

Flex Subnetting - Subnet Calculator

Chrome extension·by Eddy Kwok
64
/ 100 SAFETY SCORE
RISKY
Several elevated signals. Read the findings before sharing this with your team.

Likely abandonedsafety score reduced by 30 points

  • No update in over 5 years
  • Bundles libraries with known vulnerabilities and no fix in sight
Why this matters

An unmaintained extension keeps whatever flaws it shipped with, and a listing with users but no owner is an attractive target to buy and repurpose.

Automated analysis of publicly available code — not a professional security audit. It may produce false positives and does not prove an extension is unsafe or safe. Treat it as one signal among many. Disclaimer · Report an issue

How it ranks

Flex Subnetting - Subnet Calculator's safety score vs every other extension we've scanned
Globally
75%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 402,581 extensions
In Productivity
87%of productivity extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 194,438 productivity extensions
Findings
5
median 16Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
2
median 3Declared in manifest
Active users
240
median 14vs category median

Findings breakdown

Automated security signal · 5 distinct issues across 6 severities
5
distinct issues
detected
Scanners reported 12 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Permissions requested

2 permissions declared
No risky permissions
2 permissions requested — none are flagged as risky.
Medium
Store local data

Can save data locally in the browser for persistence

Medium
Access user identity

Can get OAuth2 tokens and access your Google account identity

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Scan performed by extenshi.io · Aug 5, 2026
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