From e6d3f17975195df501f6773a3e2538104471b960 Mon Sep 17 00:00:00 2001
From: Touhidur Rahman <abir.ruet@gmail.com>
Date: Fri, 16 Jun 2023 22:38:57 +0600
Subject: [PATCH] pkp/pkp-lib#9084 Mailable subject construction removing any
 html chars

---
 classes/mail/Mailable.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/classes/mail/Mailable.php b/classes/mail/Mailable.php
index 1ea4abaeb0b..9ca7905d578 100644
--- a/classes/mail/Mailable.php
+++ b/classes/mail/Mailable.php
@@ -354,7 +354,11 @@ protected function addFooter(string $locale): self
     protected function buildSubject($message): self
     {
         $this->subject ??= ''; // Allow email with empty subject if not set
-        $subject = app('mailer')->compileParams($this->subject, $this->viewData);
+        $withoutTagViewData = collect($this->viewData)
+            ->map(fn(mixed $viewableData) => is_string($viewableData) ? strip_tags($viewableData) : $viewableData)
+            ->toArray();
+            
+        $subject = app('mailer')->compileParams($this->subject, $withoutTagViewData);
         if (empty($subject)) {
             trigger_error(
                 'You are sending ' . static::getName() ?? static::class . ' email with empty subject',