diff --git a/src/fides/api/service/connectors/mysql_connector.py b/src/fides/api/service/connectors/mysql_connector.py
index 4428125e2d0..80d01d3f949 100644
--- a/src/fides/api/service/connectors/mysql_connector.py
+++ b/src/fides/api/service/connectors/mysql_connector.py
@@ -1,4 +1,5 @@
 from typing import Dict, List
+from urllib.parse import quote
 
 from sqlalchemy.engine import Engine, LegacyCursorResult, create_engine  # type: ignore
 
@@ -24,13 +25,15 @@ class MySQLConnector(SQLConnector):
     secrets_schema = MySQLSchema
 
     def build_uri(self) -> str:
-        """Build URI of format mysql+pymysql://[user[:password]@][netloc][:port][/dbname]"""
+        """Build URI of format mysql+pymysql://[user[:password]@][netloc][:port][/dbname].
+        Username and password are URL-encoded so that reserved characters (e.g. @, :) do not
+        break URI parsing."""
         config = self.secrets_schema(**self.configuration.secrets or {})
 
         user_password = ""
         if config.username:
-            user = config.username
-            password = f":{config.password}" if config.password else ""
+            user = quote(str(config.username), safe="")
+            password = f":{quote(str(config.password), safe='')}" if config.password else ""
             user_password = f"{user}{password}@"
 
         netloc = config.host
@@ -40,13 +43,15 @@ def build_uri(self) -> str:
         return url
 
     def build_ssh_uri(self, local_address: tuple) -> str:
-        """Build URI of format mysql+pymysql://[user[:password]@][ssh_host][:ssh_port][/dbname]"""
+        """Build URI of format mysql+pymysql://[user[:password]@][ssh_host][:ssh_port][/dbname].
+        Username and password are URL-encoded so that reserved characters (e.g. @, :) do not
+        break URI parsing."""
         config = self.secrets_schema(**self.configuration.secrets or {})
 
         user_password = ""
         if config.username:
-            user = config.username
-            password = f":{config.password}" if config.password else ""
+            user = quote(str(config.username), safe="")
+            password = f":{quote(str(config.password), safe='')}" if config.password else ""
             user_password = f"{user}{password}@"
 
         local_host, local_port = local_address
diff --git a/src/fides/api/service/connectors/postgres_connector.py b/src/fides/api/service/connectors/postgres_connector.py
index 86b57cae127..d0c075e1318 100644
--- a/src/fides/api/service/connectors/postgres_connector.py
+++ b/src/fides/api/service/connectors/postgres_connector.py
@@ -1,3 +1,5 @@
+from urllib.parse import quote
+
 from loguru import logger
 from sqlalchemy import text
 from sqlalchemy.engine import Connection, Engine, create_engine  # type: ignore
@@ -25,13 +27,15 @@ def requires_primary_keys(self) -> bool:
         return False
 
     def build_uri(self) -> str:
-        """Build URI of format postgresql://[user[:password]@][netloc][:port][/dbname]"""
+        """Build URI of format postgresql://[user[:password]@][netloc][:port][/dbname].
+        Username and password are URL-encoded so that reserved characters (e.g. @, :) do not
+        break URI parsing."""
         config = self.secrets_schema(**self.configuration.secrets or {})
 
         user_password = ""
         if config.username:
-            user = config.username
-            password = f":{config.password}" if config.password else ""
+            user = quote(str(config.username), safe="")
+            password = f":{quote(str(config.password), safe='')}" if config.password else ""
             user_password = f"{user}{password}@"
 
         netloc = config.host
@@ -41,13 +45,15 @@ def build_uri(self) -> str:
         return f"postgresql://{user_password}{netloc}{port}{dbname}{query}"
 
     def build_ssh_uri(self, local_address: tuple) -> str:
-        """Build URI of format postgresql://[user[:password]@][ssh_host][:ssh_port][/dbname]"""
+        """Build URI of format postgresql://[user[:password]@][ssh_host][:ssh_port][/dbname].
+        Username and password are URL-encoded so that reserved characters (e.g. @, :) do not
+        break URI parsing."""
         config = self.secrets_schema(**self.configuration.secrets or {})
 
         user_password = ""
         if config.username:
-            user = config.username
-            password = f":{config.password}" if config.password else ""
+            user = quote(str(config.username), safe="")
+            password = f":{quote(str(config.password), safe='')}" if config.password else ""
             user_password = f"{user}{password}@"
 
         local_host, local_port = local_address
diff --git a/src/fides/api/service/connectors/redshift_connector.py b/src/fides/api/service/connectors/redshift_connector.py
index 14e149770a4..f3dd7457b9a 100644
--- a/src/fides/api/service/connectors/redshift_connector.py
+++ b/src/fides/api/service/connectors/redshift_connector.py
@@ -1,5 +1,5 @@
 from typing import Dict, Union
-from urllib.parse import quote_plus
+from urllib.parse import quote
 
 from loguru import logger
 from sqlalchemy import text
@@ -22,25 +22,32 @@ class RedshiftConnector(SQLConnector):
     secrets_schema = RedshiftSchema
 
     def build_ssh_uri(self, local_address: tuple) -> str:
-        """Build SSH URI of format redshift+psycopg2://[user[:password]@][ssh_host][:ssh_port][/dbname]"""
+        """Build SSH URI of format redshift+psycopg2://[user[:password]@][ssh_host][:ssh_port][/dbname].
+        Username and password are URL-encoded so that reserved characters (e.g. @, :) do not
+        break URI parsing."""
         local_host, local_port = local_address
 
         config = self.secrets_schema(**self.configuration.secrets or {})
 
         port = f":{local_port}" if local_port else ""
         database = f"/{config.database}" if config.database else ""
-        url = f"redshift+psycopg2://{config.user}:{config.password}@{local_host}{port}{database}"
+        user = quote(str(config.user), safe="")
+        password = quote(str(config.password), safe="")
+        url = f"redshift+psycopg2://{user}:{password}@{local_host}{port}{database}"
         return url
 
     # Overrides BaseConnector.build_uri
     def build_uri(self) -> str:
-        """Build URI of format redshift+psycopg2://user:password@[host][:port][/database]"""
+        """Build URI of format redshift+psycopg2://user:password@[host][:port][/database].
+        Username and password are URL-encoded so that reserved characters (e.g. @, :) do not
+        break URI parsing."""
         config = self.secrets_schema(**self.configuration.secrets or {})
 
-        url_encoded_password = quote_plus(config.password)
+        user = quote(str(config.user), safe="")
+        password = quote(str(config.password), safe="")
         port = f":{config.port}" if config.port else ""
         database = f"/{config.database}" if config.database else ""
-        url = f"redshift+psycopg2://{config.user}:{url_encoded_password}@{config.host}{port}{database}"
+        url = f"redshift+psycopg2://{user}:{password}@{config.host}{port}{database}"
         return url
 
     # Overrides SQLConnector.create_client