Require the correct password to rehash it

src/Illuminate/Auth/SessionGuard.php

@@ -573,6 +573,26 @@ protected function cycleRememberToken(AuthenticatableContract $user)
         $this->provider->updateRememberToken($user, $token);
     }
 
+    /**
+     * Rehash the user's password.
+     *
+     * @param  string  $password
+     * @param  string  $attribute
+     * @return bool|null
+     *
+     * @throws AuthenticationException If the password is invalid.
+     */
+    protected function rehashUserPassword($password, $attribute)
+    {
+        if (! Hash::check($password, $this->user()->$attribute)) {
+            throw new AuthenticationException('Password mismatch.');
+        }
+
+        return tap($this->user()->forceFill([
+            $attribute => Hash::make($password),
+        ]))->save();
+    }
+
     /**
      * Invalidate other sessions for the current user.
      *
@@ -588,9 +608,7 @@ public function logoutOtherDevices($password, $attribute = 'password')
             return;
         }
 
-        $result = tap($this->user()->forceFill([
-            $attribute => Hash::make($password),
-        ]))->save();
+        $result = $this->rehashUserPassword($password, $attribute);
 
         if ($this->recaller() ||
             $this->getCookieJar()->hasQueued($this->getRecallerName())) {

tests/Integration/Auth/AuthenticationTest.php

@@ -2,6 +2,7 @@
 
 namespace Illuminate\Tests\Integration\Auth;
 
+use Illuminate\Auth\AuthenticationException;
 use Illuminate\Auth\EloquentUserProvider;
 use Illuminate\Auth\Events\Attempting;
 use Illuminate\Auth\Events\Authenticated;
@@ -211,7 +212,7 @@ public function testLoggingOutOtherDevices()
 
         $this->assertEquals(1, $user->id);
 
-        $this->app['auth']->logoutOtherDevices('adifferentpassword');
+        $this->app['auth']->logoutOtherDevices('password');
         $this->assertEquals(1, $user->id);
 
         Event::assertDispatched(OtherDeviceLogout::class, function ($event) {
@@ -222,6 +223,20 @@ public function testLoggingOutOtherDevices()
         });
     }
 
+    public function testPasswordMustBeValidToLogOutOtherDevices()
+    {
+        $this->expectException(AuthenticationException::class);
+        $this->expectExceptionMessage('Password mismatch.');
+
+        $this->app['auth']->loginUsingId(1);
+
+        $user = $this->app['auth']->user();
+
+        $this->assertEquals(1, $user->id);
+
+        $this->app['auth']->logoutOtherDevices('adifferentpassword');
+    }
+
     public function testLoggingInOutViaAttemptRemembering()
     {
         $this->assertTrue(