10 Common Authentication Attacks & How FusionAuth Stops Them
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10 attacks your login screen should be terrified of.<br>Every one of them arrives with a valid username and password. If that's all your login screen checks, they're already halfway in.
FusionAuth's Intelligent MFA looks beyond the password, evaluates ten risk signals, and decides who actually belongs. Keep scrolling—which ones would your login catch?
Meet the lineup
01.<br>The Teleporter
Logged in from Tallinn, then just nine minutes later, São Paulo. Either you cracked teleportation or two people are sharing one password (and only one of them is you).
RISK:<br>High Risk
SIGNAL:<br>ImpossibleTravel
TARGETS:<br>SaaS
Enterprises with a location-bound workforce
02.<br>The Stranger
New laptop, who dis? Your real devices have been here before. This one just walked in off the street and acts like it owns the place.
RISK:<br>High Risk
SIGNAL:<br>UnrecognizedDevice
TARGETS:<br>Banking
Fintech
Healthcare
03.<br>The Gatecrasher
No hand stamp, no re-entry. This device never got its wristband — it's just hoping nobody checks.
RISK:<br>Medium Risk
SIGNAL:<br>UntrustedDevice
TARGETS:<br>Consumer apps with repeat logins
04.<br>The Usual Suspect
This IP has a rap sheet a mile long — botnets, fraud rings, the works. Step into the lineup, please.
RISK:<br>High Risk
SIGNAL:<br>BlocklistedIP
TARGETS:<br>E-commerce
Payments
High-traffic
05.<br>The Fossil
This password walked to school uphill. Both ways. In the snow. And it's been in a breach dump ever since.
RISK:<br>High Risk
SIGNAL:<br>DormantPassword
TARGETS:<br>Regulated industries with rotation policies
06.<br>The Locksmith
Changed the password ninety seconds ago. Cute. That's exactly what someone does the moment they break in — re-key the locks so the real owner can't get back in.
RISK:<br>High Risk
SIGNAL:<br>RecentPasswordChange
TARGETS:<br>Banking
Crypto
Marketplaces
07.<br>The Body Snatcher
Just slid a fresh recovery email onto the account. Now every reset link quietly goes to them. The takeover is already half done.
RISK:<br>High Risk
SIGNAL:<br>RecentIdentityAdded
TARGETS:<br>Email
Social
Financial Services
08.<br>The Grave Robber
This account has been dead for two years. Nobody's watching it — which is the entire reason they came digging. Waking after long silence reeks of takeover.
RISK:<br>High Risk
SIGNAL:<br>DormantAccount
TARGETS:<br>Subscriptions
Loyalty & Legacy Systems
09.<br>The Bad Disguise
Its browser string is on every “known attack tooling” list there is. Real humans don't browse with that. Nice fake mustache, though.
RISK:<br>Medium Risk
SIGNAL:<br>SuspiciousUserAgent
TARGETS:<br>Public Web Apps
APIs Hit by Scrapers
10.<br>The Swarm
Typed the password in four milliseconds, dead-flat cadence, zero human hesitation. It's not a person. It's a script — and there are thousands of them.
RISK:<br>High Risk
SIGNAL:<br>BotDetected
TARGETS:<br>High-volume Consumer Logins at Scale
THE BOUNCER<br>So how does one bouncer catch all ten?<br>Every login runs the gauntlet. FusionAuth scores it against all ten signals in a single pass, then decides how hard to make them prove it.
Read the Docs
Stop letting attackers bluff their way in.<br>Most MFA products stop at the challenge. FusionAuth decides when a challenge is actually needed. Intelligent MFA built right into your auth platform. Transparent pricing. Complete control. No 2 a.m. patching.
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