diff --git a/core/modules/filter/filter.module b/core/modules/filter/filter.module
index 77b27942e14b90ed33ef24211a507638fc40cc06..b05144361e867cd25b5a20c34bee5c2f6f97363d 100644
--- a/core/modules/filter/filter.module
+++ b/core/modules/filter/filter.module
@@ -537,7 +537,7 @@ function _filter_url($text, $filter) {
$tasks['_filter_url_parse_full_links'] = $pattern;
// Match email addresses.
- $url_pattern = "[\p{L}\p{M}\p{N}._-]{1,254}@(?:$domain)";
+ $url_pattern = "[\p{L}\p{M}\p{N}._+-]{1,254}@(?:$domain)";
$pattern = "`($url_pattern)`u";
$tasks['_filter_url_parse_email_links'] = $pattern;
diff --git a/core/modules/filter/src/Tests/FilterUnitTest.php b/core/modules/filter/src/Tests/FilterUnitTest.php
index 8e6c5db2082150307db6263896e9d502e749ea97..b606a4ba28ff26ce8f7e67669467c7debb1bdc74 100644
--- a/core/modules/filter/src/Tests/FilterUnitTest.php
+++ b/core/modules/filter/src/Tests/FilterUnitTest.php
@@ -515,7 +515,7 @@ function testUrlFilter() {
// Create a email that is too long.
$long_email = str_repeat('a', 254) . '@example.com';
$too_long_email = str_repeat('b', 255) . '@example.com';
-
+ $email_with_plus_sign = 'one+two@example.com';
// Filter selection/pattern matching.
$tests = array(
@@ -528,12 +528,13 @@ function testUrlFilter() {
),
// MAILTO URLs.
'
-person@example.com or mailto:person2@example.com or ' . $long_email . ' but not ' . $too_long_email . '
+person@example.com or mailto:person2@example.com or ' . $email_with_plus_sign . ' or ' . $long_email . ' but not ' . $too_long_email . '
' => array(
'person@example.com' => TRUE,
'mailto:person2@example.com' => TRUE,
'' . $long_email . '' => TRUE,
'' . $too_long_email . '' => FALSE,
+ '' . $email_with_plus_sign . '' => TRUE,
),
// URI parts and special characters.
'