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+---
+title: MISP 2.4.147 released (improvements and bug fixes release)
+layout: post
+featured: /assets/images/misp/blog/misp-openapi.png
+---
+
+# MISP 2.4.147 released
+
+MISP 2.4.144 released including a massive number of small improvements, bug and security fixes. We strongly recommend all MISP users to upgrade as soon as possible. This release fixes [CVE-2021-37534](https://cvepremium.circl.lu/cve/CVE-2021-37534).
+
+# Sync improvements
+
+Many improvements were done in the synchronisation such as:
+
+- When saving sightings, push just new sightings.
+- Filter out existing sightings if remote sever supports that method.
+- Check if event exists before pushing.
+- Check event existence before pushing sightings.
+- Optimise event filtering.
+
+# API/CLI
+
+Many improvements in the API and CLI.
+
+This release also includes refactoring of various forms to support future major improvements in MISP.
+
+# Acknowledgement
+
+We would like to thank all the [contributors](https://www.misp-project.org/contributors), reporters and users who have helped us in the past months to improve MISP and information sharing at large. This release includes multiple updates in [misp-objects](https://www.misp-project.org/objects.html), [misp-taxonomies](https://www.misp-project.org/taxonomies.html) and [misp-galaxy](https://www.misp-project.org/galaxy.html)
+.
+
+As always, a detailed and [complete changelog is available](https://www.misp-project.org/Changelog.txt) with all the fixes, changes and improvements.
+