New Clipboard Defense
Opera Introduces Paste Protect to Automatically Block Clipboard Attacks, Combating Rising ClickFix Threats
Anonymous
Key Points
1
ClickFix attacks account for more than 53% of malicious activity in 2025, highlighting the scale of the threat Opera is addressing.
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Paste Protect is free to use and is enabled by default in Opera’s desktop browser, lowering barriers to adoption for broader user protection.
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ClickFix-style attacks can sidestep many defenses, including antivirus software and email filters, making clipboard-based defenses like Paste Protect particularly important.
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The Lumma Stealer case has used fake CAPTCHAs and ClickFix-style prompts to distribute malware, illustrating real-world risks highlighted by Paste Protect coverage.
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Advanced users can override a block by holding Ctrl+C for five seconds to force copying from trusted sources, providing a deliberate bypass option for trusted workflows.
Opera has launched Paste Protect, a free security feature built into its desktop browser that automatically blocks malicious commands copied from websites. The tool targets so-called ClickFix attacks, where scam sites trick users into pasting harmful commands into their own computers — a method that antivirus software is not designed to stop, according to Bleeping Computer.
ClickFix attacks accounted for more than 53% of all malware loader activity in 2025, according to Huntress. Opera says Paste Protect is enabled by default on Windows, macOS, and Linux, making it the first major browser to offer this kind of native, real-time clipboard defense.
How ClickFix Turns Users Into Their Own Attackers
A ClickFix attack follows a simple script. A fake website shows an error — say,
Because the user runs the command themselves, antivirus tools miss it entirely. The software sees a legitimate user action, not a threat. ClickFix attacks surged 517% in the first half of 2025 alone, according to ESET. The Lumma Stealer malware used this exact method, hiding behind fake CAPTCHAs to push harmful commands onto millions of devices.
Paste Protect Catches Threats at the Clipboard Before They Spread
Paste Protect adds a new layer called Injection Protection on top of Opera's existing Hijack Protection. Hijack Protection, first introduced in 2021, stops outside apps from quietly swapping clipboard content — like replacing a bank account number. Injection Protection goes further by scanning clipboard content in real time and blocking anything that looks like a malicious script, according to Bleeping Computer.
When a block fires, users see a red warning and a preview of the first 120 characters of the blocked content. They can override the block or whitelist a trusted site. Advanced users who need to copy terminal commands can hold Ctrl+C for five seconds to force the copy. Opera's Head of Security, Pawel Kurzelewski, said:
Browser Defense Versus OS Defense: Two Different Approaches
Apple took a different path in macOS Tahoe, adding a warning inside the Terminal app itself when a suspicious command is pasted. Opera's method acts earlier — it blocks the command before it ever reaches the system clipboard. Security analysts consider the browser-level approach more proactive, since it cuts off the threat at the source, according to Bleeping Computer.
Critics have raised some concerns. Real-time clipboard scanning inside a browser prompts questions about privacy. Opera says all scanning happens locally on the device and only checks for known malicious patterns, according to Windows Report. Others note that whitelisting has limits — if a trusted site gets hacked, Paste Protect would not catch it.
Why Browser-Native Protection Matters More Than Ever in 2025
Sixteen million devices were infected by infostealers like Lumma and Vidar in 2025, according to IBM X-Force research. These tools steal passwords, session cookies, and crypto wallet addresses. Because ClickFix bypasses both email filters and antivirus scans, it has become one of the fastest-growing entry points for this kind of theft.
If Chrome and Edge adopt similar native protections, analysts believe the ClickFix attack method could become far less effective by late 2027. For now, Opera's Paste Protect offers a concrete, default-on defense that requires nothing from the user. Mohamed Salah, Opera's Senior Director of Product, said the move was a natural step:
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