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World desk3 min

MetaMask Security FAQ: Seed Phrases, Transactions, and Connected Apps

A MetaMask dapp connection alone cannot transfer your crypto, but exposed recovery phrases, signatures, and token approvals can put assets at risk. Here’s how to distinguish them and respond safely.
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Connecting a site to MetaMask usually lets it see your connected public address and public blockchain activity; it does not, by itself, let the site transfer your crypto. The bigger risks are exposing your Secret Recovery Phrase (SRP), signing a transaction you do not understand, or approving a token allowance that gives a contract access to your tokens.

What do your MetaMask password and Secret Recovery Phrase do?

They are different credentials. For a phrase-based wallet, the password unlocks MetaMask on a device; the SRP is the master recovery credential used to restore the wallet and accounts derived from it. MetaMask says a newly created wallet generates a 12-word SRP. Other wallets may use a different number of words.

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MetaMask cannot recover a lost SRP. If you lose access to a phrase-based wallet and do not have its SRP, MetaMask cannot restore access for you. Back up the phrase offline, in the correct order, and somewhere others cannot easily find it. Do not store it in a cloud file or share it with anyone, including someone claiming to be support. MetaMask’s guidance is in How to secure your Secret Recovery Phrase and password.

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MetaMask also offers account-linked setup methods, including Google, Apple, or Telegram sign-in. Access and recovery for those setups depend on the linked account and password, so do not assume the phrase-based password flow applies. Check the current in-app directions and confirm your backups before resetting or moving a wallet. MetaMask’s basic security tips state: “We will never ask you to provide your SRP.”

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What can a connected dapp see or do?

A connection generally reveals the public address you choose to connect and information already visible on the blockchain, such as balances and transaction activity. A connection request is not the same as permission to transfer assets: a site needs you to sign a transaction or grant a relevant token permission. MetaMask explains this distinction in its dapp connection guidance.

  • Connection: Lets the dapp interact with the selected public address and view public blockchain information.
  • Transaction signature: Authorizes a specific on-chain action. Read the prompt and stop if you cannot understand what it will do.
  • Token approval: Gives a contract permission to access a specified type and amount of token. Some requests are effectively unlimited; review the amount and use a custom cap when appropriate.

Transaction data can be difficult to interpret. Do not treat a familiar website or an alert-free prompt as proof that a signature is safe.

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Does disconnecting a dapp revoke token approvals?

No. Disconnecting removes the site’s connection permission; it does not undo token allowances you previously granted. Allowance revocation is a separate on-chain transaction and can incur gas. MetaMask’s allowance guidance describes reviewing and revoking approvals through MetaMask Portfolio on Ethereum Mainnet, Polygon, and BNB Chain. Network support and interface steps can change, so confirm current coverage in Portfolio before acting.

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What do MetaMask security alerts mean?

Alerts provide trust signals about sites, addresses, and transaction data, but they do not block you from proceeding. Treat a warning as a reason to stop and inspect the request—not as the only time to be cautious. MetaMask says certain dapp URLs, JSON-RPC methods, chain IDs, and transaction data may be shared with security partners for checks; it says SRPs, private keys, and credentials are not shared. That is MetaMask’s own description of its data handling; see its security alerts explanation.

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What should you do if your MetaMask wallet may be compromised?

Stop using the exposed wallet and phrase. MetaMask advises creating a new wallet on a different browser profile or device, securing its recovery credentials, and transferring remaining assets only if it is safe to do so. If a sweeper may be watching the compromised account, do not send more funds there to cover gas; that could expose the additional funds as well. Discontinue the old wallet and accounts derived from the exposed phrase. Follow MetaMask’s current hacked or scammed account guidance for your situation.

MetaMask cannot reverse confirmed transactions or restore missing funds. Its Help Center states: “Unfortunately, transactions cannot be reversed, nor missing funds restored.” Report the incident through the Contact Support function on the official MetaMask Help Center. MetaMask says it has no support phone number and support will never ask for your SRP; ignore unsolicited messages or DMs requesting secret credentials.

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Would a hardware wallet improve security?

MetaMask says people holding a high value of assets may consider a hardware wallet. It keeps keys offline and requires physical interaction to approve transactions, adding a signing barrier compared with signing solely in a software wallet. It is not a complete defense: a user can still approve a malicious transaction, make a mistake, or expose recovery credentials. MetaMask’s overview is in hardware wallets and MetaMask.

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