diff --git a/resources/desktop/com.github.rssguard.appdata.xml b/resources/desktop/com.github.rssguard.appdata.xml
index a72007242..ae258f422 100644
--- a/resources/desktop/com.github.rssguard.appdata.xml
+++ b/resources/desktop/com.github.rssguard.appdata.xml
@@ -26,7 +26,7 @@
   <url type="donation">https://github.com/sponsors/martinrotter</url>
   <content_rating type="oars-1.1" />
   <releases>
-    <release version="4.0.4" date="2021-12-14"/>
+    <release version="4.0.4" date="2021-12-15"/>
   </releases>
   <content_rating type="oars-1.0">
     <content_attribute id="violence-cartoon">none</content_attribute>
diff --git a/src/librssguard/core/filterutils.cpp b/src/librssguard/core/filterutils.cpp
index 76bfce161..d9854ed4e 100644
--- a/src/librssguard/core/filterutils.cpp
+++ b/src/librssguard/core/filterutils.cpp
@@ -9,6 +9,7 @@
 #include <QHostInfo>
 #include <QJsonArray>
 #include <QJsonDocument>
+#include <QProcess>
 
 FilterUtils::FilterUtils(QObject* parent) : QObject(parent) {}
 
@@ -84,3 +85,21 @@ QString FilterUtils::fromXmlToJson(const QString& xml) const {
 QDateTime FilterUtils::parseDateTime(const QString& dat) const {
   return TextFactory::parseDateTime(dat);
 }
+
+QString FilterUtils::runExecutableGetOutput(const QString& executable, const QStringList& arguments) const {
+  QProcess proc;
+
+  proc.setProgram(executable);
+  proc.setArguments(arguments);
+
+  proc.start();
+
+  if (proc.waitForFinished() &&
+      proc.exitStatus() == QProcess::ExitStatus::NormalExit &&
+      proc.exitCode() == EXIT_SUCCESS) {
+    return proc.readAllStandardOutput();
+  }
+  else {
+    return proc.readAllStandardError().simplified();
+  }
+}
diff --git a/src/librssguard/core/filterutils.h b/src/librssguard/core/filterutils.h
index 565836254..0387dad9e 100644
--- a/src/librssguard/core/filterutils.h
+++ b/src/librssguard/core/filterutils.h
@@ -22,6 +22,7 @@ class FilterUtils : public QObject {
 
     // Parses string into date/time object.
     Q_INVOKABLE QDateTime parseDateTime(const QString& dat) const;
+    Q_INVOKABLE QString runExecutableGetOutput(const QString& executable, const QStringList& arguments = {}) const;
 };
 
 #endif // FILTERUTILS_H