diff --git a/modules/website/wordpress/wordpress-cron-manager.sh b/modules/website/wordpress/wordpress-cron-manager.sh
index d862bd2..d48d8fc 100755
--- a/modules/website/wordpress/wordpress-cron-manager.sh
+++ b/modules/website/wordpress/wordpress-cron-manager.sh
@@ -413,7 +413,11 @@ safe_add_cron_job() {
     fi
 
     # Add the job to crontab
-    (crontab -u "$user" -l 2>/dev/null; echo "$cron_time $cron_cmd") | crontab -u "$user" - 2>/dev/null
+    # CRITICAL: Must verify crontab -l succeeded before piping back
+    # If crontab -l fails, we would pipe only the new job, losing existing jobs!
+    local current_crontab
+    current_crontab=$(crontab -u "$user" -l 2>/dev/null) || return 1
+    (echo "$current_crontab"; echo "$cron_time $cron_cmd") | crontab -u "$user" - 2>/dev/null
     return $?
 }
 
@@ -430,7 +434,10 @@ safe_remove_cron_jobs() {
     fi
 
     # Remove jobs matching pattern
-    crontab -u "$user" -l 2>/dev/null | grep -v "$pattern" | crontab -u "$user" - 2>/dev/null
+    # CRITICAL: Must verify crontab -l succeeded before piping back
+    local current_crontab
+    current_crontab=$(crontab -u "$user" -l 2>/dev/null) || return 1
+    echo "$current_crontab" | grep -v "$pattern" | crontab -u "$user" - 2>/dev/null
     return $?
 }