Browser Extension Top 10 Security Vulnerabilities #1517
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Add OWASP Browser Extension Vulnerabilities Cheat Sheet
Create BrowserExtensionVulnerabilities.md
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This is very nice work |
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@paragbagul111 content looks good, can you please fix the linter errors |
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Hi All I have fixed the linter error. Please take a moment to review the changes I made. Thank you |
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I have updated the numbering for the vulnerabilities as suggested. Specifically, I changed the second '## 4. Code Injection' to '## 5. Code Injection' and adjusted the subsequent numbers accordingly. The changes have been implemented as requested. |
Improvement done linter error fixed
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I have made some changes to resolve issues in the BrowserExtensionVulnerabilities.md Can You check again |
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I have fixed the linting errors in the code. Could you please review and merge the pull request at your convenience? Thank you! |
Fixed Lint Errors
Fixed Lint Error Final
Removed comments that could potentially break JSON code
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@paragbagul111 we are still waiting for you to fix linter errors ;-) |
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I’m working on fixing some linting issues in the code, but I’m running into trouble because of certain code snippets. Would it be okay if I temporarily removed them to resolve the issues? |
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Yes sounds good! |
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The changes are done. Let me know if you need anything else. |
Changes Completed - Vulnerable Code Snippets Removed
paragbagul111
dismissed stale reviews from jmanico and mackowski
via
f3580ae
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Can you take a look at these? cheatsheets/BrowserExtensionVulnerabilities.md:1 MD022/blanks-around-headings/blanks-around-headers Headings should be surrounded by blank lines [Expected: 1; Actual: 0; Below] [Context: "# Browser Extension Security Vulnerabilities"] |
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Yes, let me fix it. I’ll share the updated version with you once it's ready. |
Key Changes: Added one blank line before each heading (##). Added one blank line after each heading.
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I would only change the name of the file to Browser_Extension_Vulnerabilities_Cheat_Sheet.md and it is ready to be merged IMO |
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Hi @jmanico and @mackowski Could you please let me know when it will be published? Thank you |
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@paragbagul111 is is already https://cheatsheetseries.owasp.org/cheatsheets/BrowserExtensionVulnerabilities.html but the link will change after we update the name of the file in this PR #1544 |
Browser Extension Security Vulnerabilities
This document outlines common security vulnerabilities found in browser extensions and provides examples of how attackers can exploit these vulnerabilities.
1. Permissions Overreach
An extension with broad permissions can access all tabs and browsing data. If the extension is compromised, an attacker can capture sensitive information from any website the user visits, including passwords and personal data.
2. Data Leakage
An extension sending the URLs of all visited pages to a remote server can inadvertently leak sensitive information, especially if users visit banking or personal sites.
3. User Input Sanitization
User inputs can execute scripts in the page's context. An attacker could inject scripts that steal cookies, session tokens, or sensitive data.
4. Insecure Fetch Call
Data sent over insecure HTTP can be intercepted by attackers on the same network, allowing them to capture sensitive information, such as tokens or personal data.
5. Code Injection
If an attacker controls the script URL, they can inject malicious code into the page, leading to data theft or manipulation of the page’s functionality.
6. Malicious Updates
If the update mechanism is compromised, attackers can push malicious code to users without their knowledge, potentially gaining control over their browsers.
7. Third-Party Dependencies
An extension relying on outdated third-party libraries may become vulnerable if those libraries have known security flaws that attackers can exploit.
8. Lack of Content Security Policy (CSP)
Without a strong CSP, attackers can inject untrusted content, increasing the risk of XSS and other attacks that manipulate the extension’s behavior.
9. Insecure Storage of Sensitive Data
Vulnerable Code Example:
If an attacker gains access to the local storage, they can easily retrieve sensitive information, such as tokens or user credentials, leading to unauthorized access.
10. Insufficient Privacy Controls
Users may be unaware of how their data is being collected or used, leading to potential abuse of their information without consent or awareness.