diff -u b/core/modules/dblog/src/Controller/DbLogController.php b/core/modules/dblog/src/Controller/DbLogController.php
--- b/core/modules/dblog/src/Controller/DbLogController.php
+++ b/core/modules/dblog/src/Controller/DbLogController.php
@@ -354,7 +354,7 @@
     else {
       $message = FALSE;
     }
-    return ($message) ? Xss::filterAdmin($message) : FALSE;
+    return $message;
   }
 
   /**
diff -u b/core/modules/dblog/src/Tests/DbLogTest.php b/core/modules/dblog/src/Tests/DbLogTest.php
--- b/core/modules/dblog/src/Tests/DbLogTest.php
+++ b/core/modules/dblog/src/Tests/DbLogTest.php
@@ -281,24 +281,6 @@
 
     // Check if the link exists (unescaped).
     $this->assertRaw($link);
-
-    // Check for XSS filtering.
-    $js_txt = 'This should not pop up!';
-    $js = '<script>alert("' . $js_txt . '");</script>';
-    $this->generateLogEntries(1, array(
-      'message' => $message,
-      'link' => $link . $js,
-    ));
-
-    $result = db_query_range('SELECT wid FROM {watchdog} ORDER BY wid DESC', 0, 1);
-    $this->drupalGet('admin/reports/dblog/event/' . $result->fetchField());
-
-    // Check if the link exists (unescaped).
-    $this->assertRaw($link);
-
-    // Check if javascript was escaped.
-    $this->assertNoRaw($js, 'Detail view: javascript in link is blocked');
-    $this->assertRaw($js_txt, 'Detail view: javascript text exists');
   }
 
   /**
@@ -320,24 +302,6 @@
 
     // Check if the link exists (unescaped).
     $this->assertRaw($message);
-
-    // Check for XSS filtering.
-    $js_txt = 'This should not pop up!';
-    $js = '<script>alert("' . $js_txt . '");</script>';
-    $this->generateLogEntries(1, array(
-      'message' => $message . $js,
-      'link' => $link,
-    ));
-
-    $result = db_query_range('SELECT wid FROM {watchdog} ORDER BY wid DESC', 0, 1);
-    $this->drupalGet('admin/reports/dblog/event/' . $result->fetchField());
-
-    // Check if the link exists (unescaped).
-    $this->assertRaw($message);
-
-    // Check if javascript was escaped.
-    $this->assertNoRaw($js, 'Detail view: javascript in message is blocked');
-    $this->assertRaw($js_txt, 'Detail view: javascript text exists ');
   }
 
   /**