Chrome Web Store

7Versions

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What our analysis found

CardStack – Credit Card Offers is not yet reviewed by Extension Auditor. Its permissions mean it can inject scripts into pages. It comes from a trusted publisher and was last updated in July 2026.

CardStack – Credit Card Offers Chrome extension security report

ID: bbilpcenklnlanphpkoljoamjhbijcmn

Supported Languages

🇺🇸English

Extension Info & Metadata

Status

Active

Version

1.3.5

Size

79.79 MB

Rating

5.0/5

Reviews

Users

Type

Extension

Updated

Jul 30, 2026

Publisher Contextual Analysis

Trusted

Author: cardstack.money
Privacy: Privacy Policy
Help: Help Center
MX records exist: Yes
Domain exists: Yes
Is disposable: No
Is role-based: Yes
Mailbox exists: Yes
Website: Visit

Extensions

Active

Obsolete

Listed

Unlisted

Users

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Screenshots & videos

Install growth

User Growth

Showing data from Mar 19, 2026 to Oct 10, 2026

Versions

+266.67%(+56 users)

Compared to 3 months ago

6 versions released in this period

Rating Count

Total: 2 ratings

Average Rating

Current: 5.00 / 5.0+5.00

See plans

React Flow

Internal permhash`2c60f00aa1…`
No malicious matches

No other extension carries this fingerprint.

Permhash (Mandiant)`4e5fa68291…`
No malicious matches

41 other extensions carry this fingerprint, none of them known malicious.

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+34 more

Item	Type	Severity	Description
scripting	Permission	Critical	This permission allows injection and execution of JavaScript on any webpage. Rated Critical because it can modify page content, steal sensitive data, and inject malicious code into any site the extension has access to.
Contextual Risk Factors	Risk Factor	High	The following context increases the overall risk: • 19% increase: Access to sensitive domains increases potential impact • 10% increase: Early script execution enables pre-emptive content manipulation
storage	Permission	Medium	This permission allows storing data locally in the browser. Rated Medium because it can persist sensitive user data, track user activities over time, and potentially store malicious payloads.
activeTab	Permission	Medium	This permission grants temporary access to the current tab. Rated Medium because it can access current page content when invoked, though limited to user-initiated actions.
tabs	Permission	Medium	This permission enables tab management and monitoring. Rated Medium because it can track open tabs, access tab metadata, and monitor user browsing patterns.
https://cardstack-production.up.railway.app/*	Host	Medium	Host permission — access limited to this URL pattern.
://www.americanexpress.com/	Host	Medium	Host permission — access limited to this URL pattern.
://global.americanexpress.com/	Host	Medium	Host permission — access limited to this URL pattern.
://secure.chase.com/	Host	Medium	Host permission — access limited to this URL pattern.
://ultimaterewardspoints.chase.com/	Host	Medium	Host permission — access limited to this URL pattern.
://myaccounts.capitalone.com/	Host	Medium	Host permission — access limited to this URL pattern.
://www.bilt.com/	Host	Medium	Host permission — access limited to this URL pattern.
Access to Sensitive Domains	Risk Factor	Medium	This extension requests access to sensitive domains: ://www.americanexpress.com/, ://global.americanexpress.com/, ://secure.chase.com/, ://ultimaterewardspoints.chase.com/, ://myaccounts.capitalone.com/
Early Content Script Execution	Risk Factor	Medium	This extension runs content scripts at document_start.
sidePanel	Permission	Low	This permission adds custom panels to the browser interface. Rated Low because it only affects browser UI elements and cannot access page content.

Sensitive Domain Access

This extension has access to the following sensitive domains:

*://www.americanexpress.com/*
*://global.americanexpress.com/*
*://secure.chase.com/*
*://ultimaterewardspoints.chase.com/*
*://myaccounts.capitalone.com/*

About this extension

Automatically add Amex and Chase offers and see the best credit card to use on any site while you shop online.

Read the publisher’s full description

CardStack helps you get more value from your credit cards while you shop online. It recommends the best card to use for a purchase based on rewards, bonus categories, credits, and available offers, so you can stop guessing and start earning more. No more missed offers. No more forgotten credits. No more leaving rewards on the table. FEATURES Use the best card every time CardStack analyzes your cards and shows which one gives you the best return for the purchase in front of you. Surface relevant offers automatically See Amex Offers, Chase Offers, and other savings opportunities while you shop. Track credits and card benefits Monitor statement credits, perks, and annual fee value so you know which cards are actually worth keeping. Maximize rewards Earn more points, miles, and cash back across your credit cards. Fast and simple CardStack is built for clarity and speed, so you can make the right decision in seconds. Privacy first CardStack does not store your full card numbers and does not sell your data. Install CardStack and get more value from every card in your wallet.

User reviews

Extension files

Browse and explore files within this extension package

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No network indicators were extracted from this version.

Version	Size	Verdict	Findings	Permhash
1.0 (1) Latest	10.22 MB	Not scanned	—	4e5fa68291cb00384e45feff04ef4b3cd1af6633d3efd6d4c71a0ea389bbdf16
1.3.5	79.79 MB	Not scanned	—	4e5fa68291cb00384e45feff04ef4b3cd1af6633d3efd6d4c71a0ea389bbdf16
1.3.2	25.20 MB	Not scanned	—	4e5fa68291cb00384e45feff04ef4b3cd1af6633d3efd6d4c71a0ea389bbdf16
1.3.1	25.15 MB	Not scanned	—	4e5fa68291cb00384e45feff04ef4b3cd1af6633d3efd6d4c71a0ea389bbdf16
1.3.0	23.77 MB	Not scanned	—	4e5fa68291cb00384e45feff04ef4b3cd1af6633d3efd6d4c71a0ea389bbdf16
1.2.0	18.39 MB	Not scanned	—	4e5fa68291cb00384e45feff04ef4b3cd1af6633d3efd6d4c71a0ea389bbdf16
1.0	10.22 MB	Not scanned	—	4e5fa68291cb00384e45feff04ef4b3cd1af6633d3efd6d4c71a0ea389bbdf16

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Not reviewed

What our analysis found