Security Alert: Confirmed Malware

This extension was removed from the Chrome Web Store as malware. Do not install it.Extension: ChessVanced

CRITICAL RISKRemoved from Chrome Web Store

ChessVanced

ID: ammcjghngpnnpibfnojlnmeghcmcgdib

Could be malicious

Supported Languages

🇺🇸US English

Extension Info & Metadata

Status

Removed

Version

3.0.0

Size

0.22 MB

Rating

3.3/5

Reviews

Users

5,000

Type

Extension

Updated

Sep 19, 2023

Publisher Contextual Analysis

Trusted

Author: urosmijajlovic43View Profile
MX records exist: Yes
Domain exists: Yes
Is disposable: No
Is role-based: No
Mailbox exists: Yes

Total Extensions

Active

Obsolete

Listed

Unlisted

Total Users

5,000

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Free Game Review for Chess.com and Lichess

ChessVanced is a tool for free game review of chess games, while you play your game on Chess.com or Lichess, the extension will analyze the game in the background, and after the game is finished you may press "Free Game Review" button to be prompted to chessvanced.com where you will view your game review

User Growth

Showing data from Sep 01, 2023 to Aug 30, 2024

Versions

No change in user count

Compared to 3 months ago

5 versions released in this period

Rating Count

Total: 10 ratings

Average Rating

Current: 3.80 / 5.0+3.80

Extracted Data

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By severity

Critical0

High3

Medium3

Low1

Versions scanned

Showing 1 of 5 scanned versions with more than one unique finding. Counts are unique findings that include each version.

Extension Version	Code Review Findings
2.5.0 Code review	7

Extension Version	Code Review Findings
2.5.0	7

Files with findings

5 distinct paths — top paths by unique finding count:

backgroundScript.js2
contentScriptWrapper.js2
contentScript.js1
manifest.json1
offscreen/mainOffscreenScript.js1

S.No.	Category	Severity	File	Summary	Found in Version
1	Data Exfiltration	high	contentScriptWrapper.js (line 161)	When the user visits chessvanced.com/analysis, the extension reads ALL accumulated game data from chrome.storage.local (full move history, FEN positions, Stockfish analysis results, player ELO ratings, player side) an…	2.5.0
2	Data Exfiltration	high	contentScript.js (line 1)	This injected script runs in the chessvanced.com page context and hands all collected user game data directly to `window.playerControllerInst.setGameFromExtension()`, a function defined and controlled entirely by the …	2.5.0
3	Privilege Escalation	high	backgroundScript.js (line 1069)	The `MemoryHandlerSet` message handler allows any page listed in `externally_connectable` (chess.com, lichess.org, and chessvanced.com) to write arbitrary key-value pairs into the extension's `chrome.storage.local` by…	2.5.0
4	Data Exfiltration	medium	offscreen/mainOffscreenScript.js (line 165)	Every chess position analyzed (including positions from chess.com games) is sent to the Lichess cloud eval API with the full FEN string, leaking the user's game positions to a third-party service regardless of which p…	2.5.0
5	Privilege Escalation	medium	manifest.json (line 52)	The `externally_connectable` manifest entry grants chess.com, lichess.org, and chessvanced.com the ability to send messages directly to the extension service worker via `chrome.runtime.sendMessage()`. Combined with th…	2.5.0
6	Unauthorized Data Collection	medium	contentScriptWrapper.js (line 14)	The content script scrapes player ELO ratings from both chess.com and lichess.org DOM elements and continuously polls game state every 2 seconds in an infinite loop. This creates a persistent surveillance pipeline: EL…	2.5.0
7	Unauthorized Data Collection	low	backgroundScript.js (line 1195)	The background script persistently stores the complete move history, all FEN board positions, player side, and ELO ratings of both players in `chrome.storage.local` with each game update. This creates a long-lived on-…	2.5.0

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URLs

IPv4

IPv6

URLs

View the external URLs this extension communicates with to understand its network activity and data interactions.

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chessvanced.com	/analysis	https://chessvanced.com/analysis
www.chess.com	/game	https://www.chess.com/game
clients2.google.com	/service/update2/crx	https://clients2.google.com/service/update2/crx
github.com	/niklasf/stockfish.wasm	https://github.com/niklasf/stockfish.wasm
emscripten.org	/docs/porting/pthreads.html	https://emscripten.org/docs/porting/pthreads.html#blocking-on-the-main-browser-thread
github.com	/ddugovic/Stockfish	https://github.com/ddugovic/Stockfish
github.com	/niklasf/stockfish.js	https://github.com/niklasf/stockfish.js
github.com	/kripken/emscripten/wiki/WebAssembly	https://github.com/kripken/emscripten/wiki/WebAssembly#binaryen-methods
lichess.org	/api/cloud-eval	https://lichess.org/api/cloud-eval?fen=${e}&multiPv=2`,s=await

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No IP addresses found

3.2 out of 5 · 10 most recent reviews

Text reviews

Positive

Negative

load too long

Boy An·13 Sept 2024

looks like they ran out of money. site went under (domain expired) was fun while it lasted.

Ayush Nanda·8 Sept 2024

clicking "free game review" takes me to some random game. It's reviewing something - but certainly not my game, or the game i finished when i hit "free game review"

David Kelley

Version History

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Code Diff

Compare extension code between any two versions.

0 changed files detected

No comparable text files found between these versions.

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Browse and explore files within this extension package

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Security Alert: Confirmed Malware

ChessVanced

Supported Languages

Extension Info & Metadata

Publisher Contextual Analysis

Chrome Web Store Metadata

About this extension

Analytics & Metrics

User Growth

Rating Count

Average Rating

Static Code Security Analysis

Extracted Data

Code Review Findings Summary Across 5 Versions7

Versions scanned

Files with findings

Extracted Indicators (URLs and IPs)

URLs

Contextual Analysis

User Reviews

Version History

Version-to-Version Code Diff

Code Diff

Extension Files

User Reviews

User Growth

Rating Count

Average Rating