1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/config/saml2_config.py b/synapse/config/saml2_config.py
index cc7401888b..755478e2ff 100644
--- a/synapse/config/saml2_config.py
+++ b/synapse/config/saml2_config.py
@@ -169,8 +169,10 @@ class SAML2Config(Config):
             saml2_config.get("saml_session_lifetime", "15m")
         )
 
+        # We enable autoescape here as the message may potentially come from a
+        # remote resource
         self.saml2_error_html_template = self.read_templates(
-            ["saml_error.html"], saml2_config.get("template_dir")
+            ["saml_error.html"], saml2_config.get("template_dir"), autoescape=True
         )[0]
 
     def _default_saml_config_dict(