In recent months, the cryptocurrency and NFT space has seen a sharp increase in cyberattacks, with hackers deploying increasingly sophisticated methods to exploit vulnerabilities. These malicious actors are no longer targeting just individual users—they’re going after major platforms to maximize their reach and damage. One of the most alarming incidents in 2025 involved CoinMarketCap, a leading crypto and NFT data aggregator, which was compromised by a hacker group that used the platform to distribute a phishing scam.
CoinMarketCap Confirms Security Breach
On June 21, 2025, the CoinMarketCap technical team issued a public statement confirming that their platform had been slightly compromised earlier that morning. Hackers exploited a vulnerability to inject a malicious pop-up across the site, prompting users to “Verify Wallet.” This deceptive prompt was designed to trick visitors into connecting their digital wallets—potentially leading to irreversible fund loss.
🚨 Security Alert
We’re aware that a malicious pop-up prompting users to "Verify Wallet" has appeared on our site.
⚠️ Do NOT connect your wallet.
Our team is actively investigating and working to resolve the issue.
— CoinMarketCap (@CoinMarketCap)
The team assured users they were working urgently to patch the vulnerability and restore full security. While the breach was labeled as “minor,” the implications were significant given the platform’s massive user base and influence in the crypto ecosystem.
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What Is CoinMarketCap?
Launched in 2013, CoinMarketCap has grown into one of the most trusted sources for cryptocurrency market data. The platform provides real-time information on over 2 million digital assets, including price movements, market capitalization, trading volume, and liquidity metrics. It also ranks and analyzes hundreds of crypto exchanges based on traffic, sales volume, and reliability.
Beyond cryptocurrencies, CoinMarketCap offers comprehensive NFT analytics, tracking key metrics such as floor prices, trading volume, market cap, and ownership trends across top collections like Bored Ape Yacht Club, Moonbirds, and more. Users can filter NFT data by category, blockchain, or platform, making it an essential tool for investors and traders.
With over 340 million monthly visitors and a social media reach of nearly 5 million daily users on X (formerly Twitter), CoinMarketCap is a cornerstone of the digital asset ecosystem—making it a high-value target for cybercriminals.
Users Report Wallet Draining After Fake Pop-Up
Shortly after the malicious pop-up went live, reports began flooding in from users who had unknowingly connected their wallets. Within two hours, multiple wallets were drained of their assets—ranging from major cryptocurrencies like ETH and SOL to high-value NFTs.
Security firm PeckShield confirmed the attack vector:
[#PeckShieldAlert] The frontend of @CoinMarketCap has been hacked, displaying a fake pop-up urging users to "Verify Wallet."
DO NOT CONNECT YOUR WALLET TO CMC.
— PeckShieldAlert (@PeckShieldAlert)
This type of front-end injection attack is particularly dangerous because it leverages a trusted domain. Users see a legitimate URL and assume the site is safe—even when it’s actively being used against them.
Key Indicators of the Attack:
- Unexpected “Verify Wallet” pop-up on CoinMarketCap
- No official announcement or maintenance notice
- Redirects to phishing domains after wallet connection
- Increased network transactions from compromised addresses
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How Did This Happen?
While CoinMarketCap has not released full technical details, early analysis suggests the breach may have stemmed from a supply chain vulnerability—possibly through a third-party script or compromised content delivery network (CDN). These types of attacks allow hackers to inject malicious code without directly accessing core servers.
Front-end attacks like this are becoming more common in the Web3 space. Because many crypto platforms rely on JavaScript-heavy interfaces and external libraries, they present numerous entry points for bad actors. Once inside, attackers can manipulate user interactions—such as wallet connections—without triggering immediate alarms.
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Frequently Asked Questions (FAQ)
What should I do if I connected my wallet during the CoinMarketCap hack?
If you connected your wallet to the fake pop-up, act immediately:
- Disconnect your wallet from all websites via your wallet settings (e.g., MetaMask’s “Connected Sites” tab).
- Revoke permissions for any unknown or suspicious contracts using tools like Revoke.cash.
- Transfer funds to a new, unused wallet address if large amounts are at risk.
- Monitor your transaction history for unauthorized activity.
Is CoinMarketCap safe to use now?
As of the latest update, CoinMarketCap stated they have resolved the issue and removed the malicious pop-up. However, remain cautious. Clear your browser cache, avoid clicking on unexpected prompts, and verify all URLs manually before interacting with any Web3 functionality.
How can I avoid similar phishing attacks?
Follow these best practices:
- Never connect your wallet unless you’re actively using a verified feature.
- Double-check URLs—even slight misspellings can lead to scams.
- Use browser extensions like MetaMask or WalletGuard that flag known phishing sites.
- Enable two-factor authentication (2FA) wherever possible.
- Stay updated via official channels of platforms you use.
Did any other platforms get affected?
There is no evidence yet that other major platforms were directly impacted by this specific attack. However, hackers often reuse tactics across multiple sites. Always remain vigilant when visiting any crypto-related website, especially those with interactive features.
Can stolen crypto be recovered?
Unfortunately, blockchain transactions are irreversible. Once funds are transferred to an attacker’s wallet, recovery is extremely difficult unless law enforcement intervenes or the hacker returns them voluntarily. Prevention is far more effective than recovery in crypto.
Was user data stolen?
CoinMarketCap has not confirmed any data breach involving personal information. The attack appears limited to front-end manipulation rather than backend database access. Still, if you entered sensitive details (like seed phrases or passwords) anywhere during this period, assume compromise and take protective steps immediately.
👉 Learn how to detect and prevent crypto phishing attacks before they happen.
Protecting Yourself in an Era of Rising Crypto Threats
The CoinMarketCap incident underscores a growing reality: even trusted platforms are vulnerable. As Web3 adoption accelerates, so do the incentives for cybercriminals. Staying safe requires constant vigilance and proactive defense strategies.
Here’s what you can do:
- Use hardware wallets for long-term asset storage.
- Regularly audit connected dApp permissions.
- Bookmark only official URLs of platforms you trust.
- Subscribe to security alerts from firms like PeckShield, CertiK, or OKX Threat Intelligence.
- Educate yourself on common scam patterns—like fake airdrops, impersonation accounts, and “urgent” verification prompts.
Cybersecurity in crypto isn’t optional—it’s essential.
Final Thoughts
The 2025 CoinMarketCap hack serves as a stark reminder that no platform is immune to attack. While the team responded quickly, the damage was already done for some users. As attackers grow more sophisticated, individual responsibility becomes even more critical.
Stay informed, stay skeptical, and always prioritize security over convenience.
By understanding threats like front-end injections and phishing pop-ups—and knowing how to respond—you can navigate the crypto and NFT landscape with greater confidence and control.