diff --git a/radicale/auth/ldap.py b/radicale/auth/ldap.py
index 0f9f9729..3116c4b8 100644
--- a/radicale/auth/ldap.py
+++ b/radicale/auth/ldap.py
@@ -35,7 +35,7 @@ class Auth(auth.BaseAuth):
     _ldap_secret: str
     _ldap_filter: str
     _ldap_load_groups: bool
-    _ldap_groups = []
+    _ldap_groups = set
 
     def __init__(self, configuration: config.Configuration) -> None:
         super().__init__(configuration)
@@ -77,10 +77,12 @@ class Auth(auth.BaseAuth):
             conn.protocol_version = 3
             conn.set_option(ldap.OPT_REFERRALS, 0)
             conn.simple_bind_s(user_dn,password)
+            tmp = []
             if self._ldap_load_groups:
-                self._ldap_groups = []
+                tmp = []
                 for t in res[0][1]['memberOf']:
-                    self._ldap_groups.append(t.decode('utf-8').split(',')[0][3:])
+                    tmp.append(t.decode('utf-8').split(',')[0][3:])
+                self._ldap_groups = set(tmp)
                 logger.debug("LDAP Auth groups of user: %s",",".join(self._ldap_groups))
             conn.unbind()
             return login
diff --git a/radicale/rights/from_file.py b/radicale/rights/from_file.py
index 01fa2fb7..51f40433 100644
--- a/radicale/rights/from_file.py
+++ b/radicale/rights/from_file.py
@@ -44,30 +44,42 @@ from radicale.log import logger
 class Rights(rights.BaseRights):
 
     _filename: str
+    _rights_config
 
     def __init__(self, configuration: config.Configuration) -> None:
         super().__init__(configuration)
         self._filename = configuration.get("rights", "file")
+        _rights_config = configparser.ConfigParser()
+        try:
+            with open(self._filename, "r") as f:
+                _rights_config.read_file(f)
+        except Exception as e:
+            raise RuntimeError("Failed to load rights file %r: %s" %
+                               (self._filename, e)) from e
 
     def authorization(self, user: str, path: str) -> str:
         user = user or ""
         sane_path = pathutils.strip_path(path)
         # Prevent "regex injection"
         escaped_user = re.escape(user)
-        rights_config = configparser.ConfigParser()
-        try:
-            with open(self._filename, "r") as f:
-                rights_config.read_file(f)
-        except Exception as e:
-            raise RuntimeError("Failed to load rights file %r: %s" %
-                               (self._filename, e)) from e
-        for section in rights_config.sections():
+
+        for section in _rights_config.sections():
+            user_match       = False
+            group_match      = []
+            collection_match = False
             try:
-                user_pattern = rights_config.get(section, "user")
-                collection_pattern = rights_config.get(section, "collection")
+                collection_pattern = _rights_config.get(section, "collection")
+                user_pattern = _rights_config.get(section, "user", fallback = "")
+                groups = _rights_config.get(section, "groups", fallback = "").split(",")
+
+                try:
+                    group_match = self._auth._ldap_groups & set(groups)
+                except NameError:
+                    pass
+
                 # Use empty format() for harmonized handling of curly braces
                 user_match = re.fullmatch(user_pattern.format(), user)
-                collection_match = user_match and re.fullmatch(
+                collection_match = re.fullmatch(
                     collection_pattern.format(
                         *(re.escape(s) for s in user_match.groups()),
                         user=escaped_user), sane_path)
@@ -75,10 +87,15 @@ class Rights(rights.BaseRights):
                 raise RuntimeError("Error in section %r of rights file %r: "
                                    "%s" % (section, self._filename, e)) from e
             if user_match and collection_match:
-                logger.debug("Rule %r:%r matches %r:%r from section %r",
+                logger.debug("User rule %r:%r matches %r:%r from section %r",
                              user, sane_path, user_pattern,
                              collection_pattern, section)
-                return rights_config.get(section, "permissions")
+                return _rights_config.get(section, "permissions")
+            if len(group_match) > 0 and collection_match:
+                logger.debug("Group rule %r:%r matches %r from section %r",
+                             group_match, sane_path,
+                             collection_pattern, section)
+                return _rights_config.get(section, "permissions")
             logger.debug("Rule %r:%r doesn't match %r:%r from section %r",
                          user, sane_path, user_pattern, collection_pattern,
                          section)