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OpenSea Says It Patched an NFT Phishing Vulnerability

The NFT marketplace said it fixed the loophole as soon as it was notified by a security firm and no accounts were compromised.

Updated May 11, 2023, 5:46 p.m. Published Oct 13, 2021, 8:58 p.m.
OpenSea NFT marketplace
OpenSea NFT marketplace

OpenSea, a popular marketplace for non-fungible tokens, has closed an NFT phishing loophole discovered by Check Point Research, a division of publicly traded security firm Check Point Software Technologies.

  • Check Point wrote about the discovery in a blog post on Wednesday and outlined the scam in a video, saying that clicking pop-ups associated with malicious, airdropped NFTs could have provided access to customers’ wallets.
  • The company said that it notified OpenSea of the vulnerability on Sept. 26 and that OpenSea fixed the issue and verified the fix within an hour.
  • “It’s important to note had an attacker attempted to take advantage of this flaw, the end user would have needed to approve the malicious transaction through a wallet signature,” OpenSea wrote in its own blog post about the issue on Wednesday. It said it hadn’t been able to identify any instances where the vulnerability was exploited.
  • The phishing attack is a common tactic in the world of NFTs – thieves will send fishy tokens to public addresses on the Ethereum blockchain and wait for users to interact with them.
  • Scams are still pervasive on the platform, and throughout crypto in general, as CoinDesk outlined in this piece on NFT phishing schemes.

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Protocol Research: GoPlus Security

GP Basic Image

What to know:

  • As of October 2025, GoPlus has generated $4.7M in total revenue across its product lines. The GoPlus App is the primary revenue driver, contributing $2.5M (approx. 53%), followed by the SafeToken Protocol at $1.7M.
  • GoPlus Intelligence's Token Security API averaged 717 million monthly calls year-to-date in 2025 , with a peak of nearly 1 billion calls in February 2025. Total blockchain-level requests, including transaction simulations, averaged an additional 350 million per month.
  • Since its January 2025 launch , the $GPS token has registered over $5B in total spot volume and $10B in derivatives volume in 2025. Monthly spot volume peaked in March 2025 at over $1.1B , while derivatives volume peaked the same month at over $4B.

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Cascade Unveils 24/7 Neo-Brokerage Offering Perpetuals on Cryptos, U.S. Stocks

Computer monitors and a laptop screen show trading charts on a desk overlooking an expanse of water at sunset. (sergeitokmakov/Pixabay, modified by CoinDesk)

The platform will let retail traders use one margin account to trade round-the-clock perpetual markets.

What to know:

  • Cascade has introduced a 24/7 brokerage-style app for perpetual markets spanning crypto, U.S. equities and private-asset exposure.
  • The firm is pitching a single, unified margin account with direct-to-bank U.S. dollar capability for deposits and withdrawals.
  • The company has raised $15 million from investors including Polychain Capital, Variant and Coinbase Ventures.