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Quillbot: AI Writing Assistant to Grammar Check, Paraphrase & Translate

Version 4.90.0 View in Chrome Web Store

Last scanned: 2 months ago | force re-scan

Extension Details

Developer: QuillBot (Course Hero), LLC

Rating: 4.7 ★ (5.5K ratings)

Users: 5,000,000

Context-Aware Verdict

CRITICAL

Overall Risk

Based on 8 total findings, including 4 high-risk findings.

Findings

HIGH

Broad Content Script Injection

This extension can inject scripts into any website. This means it could potentially read sensitive data, modify website content, or steal credentials.

HIGH

Broad Host Permissions

This extension has broad host permissions allowing it to access many or all websites. This could potentially be used to steal sensitive data or track browsing activity.

HIGH

High-Risk Permission: cookies

This extension has the cookies permission. Can access and modify browser cookies. This could potentially be used maliciously to compromise security or privacy.

HIGH

Unsafe WebAssembly Execution

This extension's Content Security Policy allows 'wasm-unsafe-eval', which permits potentially dangerous WebAssembly code execution. This could be used to hide malicious code or perform CPU-intensive operations.

MEDIUM

Medium-Risk Permission: activeTab

This extension has the activeTab permission. Can access the active tab when clicking the extension icon.

MEDIUM

Medium-Risk Permission: contextMenus

This extension has the contextMenus permission. Can add items to the context menu.

MEDIUM

Medium-Risk Permission: notifications

This extension has the notifications permission. Can show notifications.

MEDIUM

Medium-Risk Permission: storage

This extension has the storage permission. Can store data locally.

Security Analysis Details

Required Permissions:

alarms
cookies
storage
activeTab
contextMenus
notifications
scripting
sidePanel

Host Permissions:

*://*/*
https://quillbot.com/
https://quillbot.com/*

Content Security Policy:

extension_pages: script-src 'self' 'wasm-unsafe-eval'; object-src 'self';

Embedded URLs (279 total):

https://prosemirror.net/docs/guide/#generatable	http://www.w3.org/2000/svg
http://www.w3.org/1999/xlink	http://www.w3.org/XML/1998/namespace
https://languagetool.org/text-cursor	https://docs.google.com
https://clients2.google.com/service/update2/crx	https://docs.google.com/document/
https://docs.google.com/presentation/	https://chatgpt.com/
https://gemini.google.com/	https://quillbot.com/
https://quillbot.dev/	https://quillbot.com
https://collector.quillbot.com	https://quillbot.com/api/pageq/apps
https://chromewebstore.google.com/detail/quillbot-ai-writing-and-g/iidnbdjijdkbmajdffnidomddglmieko/reviews?utm_source=chrome-active&utm_medium=referral&utm_campaign=feedback_review_cta_link	https://microsoftedge.microsoft.com/addons/detail/cphpplikchcioccedpjacdanfibnimmh
https://apps.apple.com/us/app/quillbot-for-safari/id6738683741	https://workspace.google.com/marketplace/app/quillbot_paraphrasing_and_summarizing_to/305988918037
https://mail.google.com/mail/	https://www.google-analytics.com
https://docs.google.com/forms/d/1iQeB8Kc-VtJ4hqgusrgTM2gqoTEfcnJRyfsLxhyezS0/viewform?edit_requested=true	https://forms.gle/9B3npkDkZ9Xqj81L6
https://help.quillbot.com/hc/en-us/articles/360056530894-How-does-QuillBot-use-my-data?referrer=	https://quillbot.com/blog/how-to-overcome-common-writing-roadblocks-part-1/
http://www.lisa.org/srx20	http://okapi.sf.net/srx-extensions
https://www.seven.one/	http://eo.lernu.net/lernado/gramatiko/demandoj/mallongigoj.php
http://www.w3.org/2000/svg%27	https://github.com/primer/github-syntax-light
https://reactjs.org/docs/error-decoder.html?invariant=	http://www.w3.org/1998/Math/MathML
http://www.w3.org/1999/xhtml	https://word.cloud.microsoft
https://onedrive.live.com	https://officeapps.live.com
https://api.languagetool.org	http://fb.me/use-check-prop-types
https://mui.com/production-error/?code=	https://bugs.webkit.org/show_bug.cgi?id=68196
https://assets.quillbot.com/fonts/opensans/open-sans-regular.woff2	https://assets.quillbot.com/fonts/opensans/open-sans-semi-bold.woff2
https://assets.quillbot.com/fonts/opensans/open-sans-bold.woff2	https://assets.quillbot.com/fonts/plusJakartaSans/PlusJakartaSans-SemiBold.woff2
https://assets.quillbot.com/fonts/quillsans/QuillSansDisplay-Bold.woff2	https://github.com/styled-components/styled-components/blob/main/packages/styled-components/src/utils/errors.md#
http://www.example.com	https://sentry.io/welcome/
https://spotlightjs.com/sidecar/npx/	https://languagetool.org/webextension/init
https://5b3c1d7a284db293d2a9dea5d8f9cd44@sentry-extension.quillbot.com/3	https://play.google.com/store/apps/details?id=com.quillbot.mobile
https://apps.apple.com/us/app/quillbot-ai-writing-keyboard/id6463116243	https://quillbot.com/app/mac
https://quillbot.com/premium?product=	https://quillbot.com/word
https://github.com/puleos/object-hash/issues/26	http://github.com/dominictarr/crypto-browserify
https://mozilla.github.io/localForage/#definedriver	https://stream.quillbot.com
https://qb-extension.firebaseio.com	https://docs.google.com/document/d/
https://docs.google.com/	https://emscripten.org/docs/getting_started/FAQ.html#how-do-i-run-a-local-webserver-for-testing-why-does-my-program-stall-in-downloading-or-preparing
https://api.languagetoolplus.com/v2	https://edit-stream.quillbot.com
https://api2.amplitude.com/2/httpapi	https://api.eu.amplitude.com/batch
https://api.eu.amplitude.com/2/httpapi	https://api2.amplitude.com/batch
https://www.docs.developers.amplitude.com/data/sdks/browser-2/#tracking-default-events	https://pageq.quillbot.com
https://bit.ly/3cXEKWf	https://console.firebase.google.com/.
https://api.lab.amplitude.com	https://flag.lab.amplitude.com
https://api.lab.eu.amplitude.com	https://flag.lab.eu.amplitude.com

Page 1 of 4

Raw Manifest

{
  "name": "__MSG_extensionName__",
  "icons": {
    "16": "assets/images/logo-16.png",
    "48": "assets/images/logo-48.png",
    "128": "assets/images/logo-128.png"
  },
  "action": {
    "default_icon": "assets/images/logo.png",
    "default_popup": "popup.html",
    "default_title": "Quillbot"
  },
  "version": "4.90.0",
  "commands": {
    "paraphrase": {
      "description": "Invoke the paraphraser-saga on the text"
    }
  },
  "background": {
    "service_worker": "quillbot-sw.js"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "short_name": "Quillbot",
  "side_panel": {
    "default_path": "sidePanel.html"
  },
  "update_url": "https://clients2.google.com/service/update2/crx",
  "description": "__MSG_extensionDescription__",
  "permissions": [
    "alarms",
    "cookies",
    "storage",
    "activeTab",
    "contextMenus",
    "notifications",
    "scripting",
    "sidePanel"
  ],
  "default_locale": "en",
  "content_scripts": [
    {
      "js": [
        "main-world-injection.js"
      ],
      "css": [],
      "world": "MAIN",
      "run_at": "document_start",
      "matches": [
        "https://docs.google.com/document/*",
        "https://docs.google.com/presentation/*"
      ],
      "all_frames": true
    },
    {
      "css": [
        "assets/css/gdocs-overrides.css"
      ],
      "run_at": "document_idle",
      "matches": [
        "https://docs.google.com/document/*",
        "https://docs.google.com/presentation/*"
      ]
    },
    {
      "js": [
        "content-gpt-humanizer.js"
      ],
      "css": [],
      "run_at": "document_idle",
      "matches": [
        "https://chatgpt.com/*",
        "https://gemini.google.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "quillbot-content.js"
      ],
      "css": [
        "assets/css/quillbot-fonts.css"
      ],
      "run_at": "document_idle",
      "matches": [
        "*://*.wordpress.com/*"
      ],
      "all_frames": true,
      "match_origin_as_fallback": true
    },
    {
      "js": [
        "quillbot-content.js"
      ],
      "css": [
        "assets/css/quillbot-fonts.css"
      ],
      "run_at": "document_idle",
      "matches": [
        "*://mail.google.com/*"
      ]
    },
    {
      "js": [
        "extension-loader.js"
      ],
      "css": [
        "assets/css/quillbot-fonts.css"
      ],
      "run_at": "document_idle",
      "matches": [
        "*://*/*"
      ],
      "all_frames": true,
      "exclude_matches": [
        "*://mail.google.com/*",
        "*://*.wordpress.com/*"
      ],
      "match_about_blank": true,
      "match_origin_as_fallback": true
    },
    {
      "css": [
        "assets/css/styles.css"
      ],
      "run_at": "document_idle",
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "match_about_blank": true,
      "match_origin_as_fallback": true
    },
    {
      "js": [
        "ai-chat.js"
      ],
      "run_at": "document_idle",
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "host_permissions": [
    "*://*/*",
    "https://quillbot.com/",
    "https://quillbot.com/*"
  ],
  "manifest_version": 3,
  "externally_connectable": {
    "matches": [
      "https://*.coursehero.com/*",
      "https://*.quillbot.com/*",
      "https://*.quillbot.dev/*",
      "https://quillbot.com/*",
      "https://quillbot.dev/*"
    ]
  },
  "minimum_chrome_version": "88",
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self';"
  },
  "web_accessible_resources": [
    {
      "matches": [
        "*://*/*"
      ],
      "resources": [
        "quillClassic.js"
      ]
    },
    {
      "matches": [
        "*://*/*"
      ],
      "resources": [
        "assets/fonts/*",
        "assets/css/*",
        "assets/images/*",
        "assets/emojibase-data/*"
      ]
    },
    {
      "matches": [
        "*://*/*"
      ],
      "resources": [
        "injection.js"
      ]
    },
    {
      "matches": [
        "*://*/*"
      ],
      "resources": [
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*/*"
      ],
      "resources": [
        "executor.js"
      ]
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "quillbot-content.js",
        "/content/styles/*",
        "toolboxjs.js",
        "toolbox.html"
      ]
    }
  ]
}

by ✦ Astarte

Quillbot: AI Writing Assistant to Grammar Check, Paraphrase & Translate

Extension Details

Context-Aware Verdict

Findings

Security Analysis Details

Required Permissions:

Host Permissions:

Content Security Policy:

Embedded URLs (279 total):

Raw Manifest

Detections

Manifest Findings