SECURITY REPORT · EXTENSHI SCAN
CardStack – Credit Card Offers
Chrome extension·by CardStack
0
/ 100 SAFETY SCORE
CRITICAL
Severe indicators. Treat as unsafe until the developer addresses these findings.
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
CardStack – Credit Card Offers's safety score vs every other extension we've scanned
Globally
0%of extensions carry more risk
Riskier ←→ Safer
Ranked against 120,712 extensions
In Lifestyle
0%of lifestyle extensions carry more risk
Riskier ←→ Safer
Ranked against 6,925 lifestyle extensions
Findings
94
median 8Lower is safer
Critical findings
8
median 0Severity = Critical
Permissions
5
median 1Declared in manifest
Active users
26
median 47vs category median
Findings breakdown
Automated security signal · 94 findings across 5 severities
94
findings
detected
detected
Critical89%
High66%
Medium7883%
Low22%
Info00%
Permissions requested
2 risky permissions of 5 total
2 high-risk permissions require attention
This extension requests 5 permissions in total. 2 of them grant broad capabilities that are worth a careful look.
High
View open tabs
Can see URLs and titles of all open tabs
High
Execute scripts in pages
Can inject and execute JavaScript code in web pages
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
Low
Use side panel
Can display content in the browser side panel
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Scan performed by extenshi.io · Jun 25, 2026
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