1 files changed, 13 insertions, 8 deletions
diff --git a/synapse/config/_base.py b/synapse/config/_base.py
index bb9bf8598d..85f65da4d9 100644
--- a/synapse/config/_base.py
+++ b/synapse/config/_base.py
@@ -194,7 +194,10 @@ class Config:
             return file_stream.read()
 
     def read_templates(
-        self, filenames: List[str], custom_template_directory: Optional[str] = None,
+        self,
+        filenames: List[str],
+        custom_template_directory: Optional[str] = None,
+        autoescape: bool = False,
     ) -> List[jinja2.Template]:
         """Load a list of template files from disk using the given variables.
 
@@ -210,6 +213,9 @@ class Config:
             custom_template_directory: A directory to try to look for the templates
                 before using the default Synapse template directory instead.
 
+            autoescape: Whether to autoescape variables before inserting them into the
+                template.
+
         Raises:
             ConfigError: if the file's path is incorrect or otherwise cannot be read.
 
@@ -233,15 +239,14 @@ class Config:
             search_directories.insert(0, custom_template_directory)
 
         loader = jinja2.FileSystemLoader(search_directories)
-        env = jinja2.Environment(loader=loader, autoescape=True)
+        env = jinja2.Environment(loader=loader, autoescape=autoescape)
 
         # Update the environment with our custom filters
-        env.filters.update(
-            {
-                "format_ts": _format_ts_filter,
-                "mxc_to_http": _create_mxc_to_http_filter(self.public_baseurl),
-            }
-        )
+        env.filters.update({"format_ts": _format_ts_filter})
+        if self.public_baseurl:
+            env.filters.update(
+                {"mxc_to_http": _create_mxc_to_http_filter(self.public_baseurl)}
+            )
 
         for filename in filenames:
             # Load the template