diff --git a/src/Command/UpgradeCommand.php b/src/Command/UpgradeCommand.php
index 5897c458..c87507e9 100644
--- a/src/Command/UpgradeCommand.php
+++ b/src/Command/UpgradeCommand.php
@@ -17,6 +17,7 @@
 use Cake\Console\Arguments;
 use Cake\Console\ConsoleIo;
 use Cake\Console\ConsoleOptionParser;
+use Cake\Core\Plugin;
 use Cake\Database\Connection;
 use Cake\Database\Exception\QueryException;
 use Cake\Datasource\ConnectionManager;
@@ -181,13 +182,24 @@ protected function findLegacyTables(Connection $connection): array
         $tables = $schema->listTables();
         $legacyTables = [];
 
+        // Build a map of expected table prefixes to plugin names for loaded plugins
+        // This allows matching plugins with special characters like CakeDC/Users
+        $pluginPrefixMap = $this->buildPluginPrefixMap();
+
         foreach ($tables as $table) {
             if ($table === 'phinxlog') {
                 $legacyTables[$table] = null;
             } elseif (str_ends_with($table, '_phinxlog')) {
                 // Extract plugin name from table name
                 $prefix = substr($table, 0, -9); // Remove '_phinxlog'
-                $plugin = Inflector::camelize($prefix);
+
+                // Try to match against loaded plugins first
+                if (isset($pluginPrefixMap[$prefix])) {
+                    $plugin = $pluginPrefixMap[$prefix];
+                } else {
+                    // Fall back to camelizing the prefix
+                    $plugin = Inflector::camelize($prefix);
+                }
                 $legacyTables[$table] = $plugin;
             }
         }
@@ -195,6 +207,26 @@ protected function findLegacyTables(Connection $connection): array
         return $legacyTables;
     }
 
+    /**
+     * Build a map of table prefixes to plugin names for all loaded plugins.
+     *
+     * This handles plugins with special characters like CakeDC/Users where
+     * the table prefix is cake_d_c_users but the plugin name is CakeDC/Users.
+     *
+     * @return array<string, string> Map of table prefix => plugin name
+     */
+    protected function buildPluginPrefixMap(): array
+    {
+        $map = [];
+        foreach (Plugin::loaded() as $plugin) {
+            $prefix = Inflector::underscore($plugin);
+            $prefix = str_replace(['\\', '/', '.'], '_', $prefix);
+            $map[$prefix] = $plugin;
+        }
+
+        return $map;
+    }
+
     /**
      * Check if a table exists.
      *
diff --git a/tests/TestCase/Command/UpgradeCommandTest.php b/tests/TestCase/Command/UpgradeCommandTest.php
index ceddd953..c7900bd7 100644
--- a/tests/TestCase/Command/UpgradeCommandTest.php
+++ b/tests/TestCase/Command/UpgradeCommandTest.php
@@ -166,4 +166,65 @@ public function testExecuteWithMigrations(): void
 
         $this->assertCount(1, $rows);
     }
+
+    /**
+     * Test that plugins with slashes (like CakeDC/Users) are correctly identified
+     * during upgrade from legacy phinxlog tables.
+     */
+    public function testExecuteWithSlashInPluginName(): void
+    {
+        Configure::write('Migrations.legacyTables', true);
+
+        // Create the plugin's phinxlog table using the adapter for cross-database compatibility
+        $config = ConnectionManager::getConfig('test');
+        $environment = new Environment('default', [
+            'connection' => 'test',
+            'database' => $config['database'],
+            'migration_table' => 'cake_d_c_users_phinxlog',
+        ]);
+        $adapter = $environment->getAdapter();
+        try {
+            $adapter->createSchemaTable();
+        } catch (Exception $e) {
+            // Table probably exists
+        }
+
+        // Insert a migration record
+        $adapter->getInsertBuilder()
+            ->insert(['version', 'migration_name', 'breakpoint'])
+            ->into('cake_d_c_users_phinxlog')
+            ->values([
+                'version' => '20250118143003',
+                'migration_name' => 'SlashPluginMigration',
+                'breakpoint' => 0,
+            ])
+            ->execute();
+
+        // Load a fake plugin with a slash in the name using loadPlugins
+        // which properly integrates with the console application
+        $this->loadPlugins(['CakeDC/Users' => ['path' => TMP]]);
+
+        try {
+            $this->exec('migrations upgrade -c test');
+            $this->assertExitSuccess();
+
+            $this->assertOutputContains('cake_d_c_users_phinxlog (CakeDC/Users)');
+
+            // Verify the plugin column has the correct value with slash
+            $rows = $this->getAdapter()->getSelectBuilder()
+                ->select(['version', 'migration_name', 'plugin'])
+                ->from('cake_migrations')
+                ->where(['migration_name' => 'SlashPluginMigration'])
+                ->all();
+
+            $this->assertCount(1, $rows);
+            $this->assertSame('CakeDC/Users', $rows[0]['plugin']);
+        } finally {
+            // Cleanup
+            /** @var \Cake\Database\Connection $connection */
+            $connection = ConnectionManager::get('test');
+            $connection->execute('DROP TABLE ' . $connection->getDriver()->quoteIdentifier('cake_d_c_users_phinxlog'));
+            $this->removePlugins(['CakeDC/Users']);
+        }
+    }
 }