Kaspersky False Positive Report (Website Flagged)
If Kaspersky has wrongly flagged your website, you file a false positive report by emailing the blocked URL to [email protected] or submitting it through the Kaspersky Threat Intelligence Portal. Include proof the site is clean. Reviews typically take a few business days, and there's no fee.
TL;DR: A Kaspersky false positive on a website is fixed by submitting the blocked URL to Kaspersky's analysts with evidence the page is clean — not by changing anything in their product. Kaspersky protects roughly 220 million users worldwide, so a stuck flag has real reach. Submit, then wait for a human review.
This guide covers the website-flag scenario only. If Kaspersky is blocking a downloaded file or an .exe you distribute, that's a separate process handled by Kaspersky's file-analysis team — and outside what we cover here. We're focused on URLs, domains, and pages that suddenly trigger a "dangerous website" or "malicious URL" warning in a browser or on a visitor's machine.
Why did Kaspersky flag my website?
Kaspersky flags a website when its URL-reputation systems associate your domain with malware, phishing, or a known bad pattern — even briefly. Most false positives trace back to a past infection, a shared IP, or a risky-looking script. Web threats remain enormous: Kaspersky products blocked over 893 million web-based attacks in a single quarter (Securelist, 2024).
Kaspersky maintains a global URL-reputation database fed by telemetry from its user base. A site can be flagged after a malware infection, a hijacked ad, a compromised plugin, or simply by sharing a server IP with a bad neighbor. Kaspersky reported blocking over 893 million web attacks in Q1 2024 (Securelist, 2024).
Common triggers for a website flag
The usual causes are mundane. Your site got hacked and served malware for a few hours before you cleaned it. A WordPress plugin had a vulnerability. An injected redirect pointed visitors somewhere shady. Or a third-party ad network served a bad creative through your pages.
Here's something owners miss: the flag often outlives the problem. You clean the site the same day, but Kaspersky's database still reflects the snapshot from when it last saw the threat. In our experience running unflag, this is the rule rather than the exception — we don't scan or clean sites ourselves, we trust the owner's cleanup and clear the residual flags that linger after the malware is already gone. The reputation lags the reality, and a false positive report is what closes that gap.
[IMAGE: Browser showing a Kaspersky "dangerous website" warning page — search terms: browser security warning blocked website]
If you're not certain Kaspersky is the only vendor flagging you, scan first with a free multi-vendor blacklist checker so you know the full picture before sending any reports.
How do I report a Kaspersky false positive for a website?
Report a Kaspersky website false positive by emailing [email protected] with the exact blocked URL, a short explanation, and evidence the page is clean — or by submitting the URL through the Kaspersky Threat Intelligence Portal (OpenTIP), which lets you request a reputation re-check directly. Both routes are free and reviewed by Kaspersky analysts.
Kaspersky accepts website false-positive reports at [email protected] and through its OpenTIP/Threat Intelligence Portal, where users can look up and dispute URL reputation. Kaspersky's threat databases are updated continuously across a network protecting roughly 220 million users, so resubmission triggers a fresh analyst review rather than an automatic clear.
Step-by-step submission
Keep it factual and short. Analysts review many reports, so make yours easy to act on.
- Confirm the flag is Kaspersky's. Note the exact warning text and the blocked URL. Test in a browser or device running Kaspersky.
- Clean the site first. In our experience running unflag, reports submitted before the malware is actually removed get rejected — and a rejection can make the next review slower. We never scan or clean sites for customers; we clear flags only once the owner has fixed the root cause, because there is no point asking an analyst to re-check a site that's still compromised.
- Gather proof. A clean scan from a reputable tool, screenshots, and a one-line note on what was removed (e.g., "removed injected JavaScript in header.php on 2026-05-20").
- Submit. Email [email protected] with the URL and evidence, or paste the URL into the Threat Intelligence Portal and request re-evaluation.
- Keep the thread. Reply to any analyst questions promptly from the same address.
What to write in the report
Lead with the URL and the word "false positive." State that the site is clean, what was fixed, and when. Attach or link your evidence. Don't argue or pad it with marketing language — analysts want the URL, the claim, and the proof, nothing more.
For the broader cleanup-and-resubmit flow across any vendor, our guide on how to remove a website from a blacklist walks through the order of operations step by step.
How long does a Kaspersky false positive review take?
Kaspersky doesn't publish a fixed turnaround for website re-evaluations, so we won't invent one. In practice, owners typically see a response within a few business days, and a confirmed-clean URL is usually cleared shortly after the analyst review completes. There is no paid fast-track — every submission goes through the same human queue.
Kaspersky reviews website false-positive submissions manually, with no published SLA and no fee. Timing depends on queue volume and how clearly you demonstrate the site is clean. Industry-wide, the volume of web threats is the reason reputation systems stay cautious — Kaspersky logged over 893 million web attacks in one quarter (Securelist, 2024).
What delays a review
Three things slow you down. First, submitting before the site is genuinely clean — the analyst re-scans and still sees the threat. Second, vague reports with no evidence. Third, an unresolved root cause that re-infects the site between submission and review.
Across the removal requests we dispatch on behalf of customers — generating a unique, vendor-specific email for each engine that flagged a domain and sending the lot over a randomized window — the pattern we keep seeing is that a stalled response is almost never about reaching the wrong inbox. We get the request to the vendor; what holds things up is on the cleanup side. Get the cleanup right and the rest is mostly waiting.
What if Kaspersky still blocks my site after I report it?
If Kaspersky still blocks your site after a report, the most common reason is that the underlying issue wasn't fully resolved when their analyst re-checked. Re-clean, confirm with an independent scan, then resubmit with the new evidence. No vendor — Kaspersky included — guarantees a delisting; the analyst's verdict is final and based on what they see.
A persistent Kaspersky block after submission usually means the site still shows signs of compromise on re-scan, or the flag is also coming from another vendor sharing data. Re-verify the site is clean, then resubmit. The decision rests entirely with Kaspersky's analysts, who re-evaluate against live URL-reputation data.
Check whether other vendors are also flagging you
A site that's "still blocked" is often flagged by several vendors at once, since many security tools share threat feeds. Clearing Kaspersky alone won't lift a warning that's actually coming from a different engine. Run a multi-vendor blacklist scan to see every flag, then report to each one.
If you're dealing with several blocklists, our overview of vendor blacklist removal explains how the contacts and processes differ from one security vendor to the next.
Can I get someone to handle the Kaspersky report for me?
Yes — a done-for-you service can prepare and send your removal requests so you don't chase contacts yourself. unflagdomain scans your domain across 124 active security vendors, then generates and dispatches a personalized removal request to each one that flagged you for a one-time €39 per domain. You clean the site; we handle the outreach.
unflagdomain is a pay-once (€39/domain) tool that scans a website across 124 active security vendors, then writes and sends a tailored removal request to each flagging vendor — including email-based ones like Kaspersky. It guarantees that requests are dispatched, not that vendors delist; every vendor makes its own call.
What it does and doesn't do
To be clear about boundaries: we don't scan for or remove malware — you clean the site first, and we trust your cleanup description. Vendors that only accept web forms, like AVG or ESET, or manual review, like Google Safe Browsing, become guided dashboard cards rather than emails — Google Safe Browsing in particular requires a manual review in Google Search Console that no tool can submit for you. And we never claim guaranteed delisting. What we guarantee is that a well-written, vendor-specific request actually reaches each flagging vendor; the dashboard then shows real sent, bounced, and failed counts per vendor, and we re-dispatch on a bounce so a request doesn't quietly fall through.
The value isn't magic — it's not missing a vendor. In our experience, owners reporting manually often clear Kaspersky and forget two other engines that were also flagging them, so the browser warning never fully disappears. Because we vary every email with Claude and send them sequentially over a roughly one-hour window with your address as Reply-To, each vendor gets a distinct, human-looking request and replies land straight in your inbox.
Key takeaways
A Kaspersky website false positive is fixable, and it's free to report. Clean the site first, then submit the blocked URL with proof to [email protected] or via the Kaspersky Threat Intelligence Portal. Expect a manual review over a few business days, and resubmit if the block persists after you've verified the site is genuinely clean.
Remember the bigger picture: a single browser warning often hides flags from multiple vendors. Start with a free blacklist check to see who's actually flagging you, work through each one, and consider a done-for-you dispatch if chasing contacts isn't a good use of your time. Either way, the path is the same — clean, prove it, ask for a re-check.
Email the exact blocked URL to [email protected] with a short note that it's a false positive and evidence the site is clean, or submit the URL through the Kaspersky Threat Intelligence Portal (OpenTIP). Both are free and reviewed by Kaspersky analysts within a few business days.
Kaspersky blocks a site when its URL-reputation database links your domain to malware, phishing, or a risky pattern. This often follows a past infection, a vulnerable plugin, an injected redirect, or a shared IP. The flag can persist for weeks after you've already cleaned the site.
Kaspersky publishes no fixed turnaround, so timing varies. In practice, owners usually get a response within a few business days, and a confirmed-clean URL is cleared shortly after. There's no paid fast-track — every report goes through the same manual analyst queue.
Yes. Submitting a website false positive to Kaspersky via [email protected] or the Threat Intelligence Portal costs nothing. Kaspersky reviews these requests as part of maintaining its URL-reputation data. A done-for-you dispatch service may charge a fee, but Kaspersky itself does not charge to review.
A persistent block usually means the site still showed signs of compromise when the analyst re-checked, or another vendor is also flagging you. Re-clean the site, confirm with an independent scan, then resubmit with fresh evidence. The verdict rests with Kaspersky's analysts — no delisting is guaranteed.