https://vulnerability.circl.lu/sightings/feed 2026-07-28T13:51:18.105327+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent sightings. https://vulnerability.circl.lu/sighting/f21e4e65-45e0-4987-91c2-11a6c36fa8f5/export 2026-07-28T13:51:18.126469+00:00 Automation user https://cve.circl.lu/user/automation {"uuid": "f21e4e65-45e0-4987-91c2-11a6c36fa8f5", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2020-21523", "type": "published-proof-of-concept", "source": "https://t.me/cibsecurity/14963", "content": "\u203c CVE-2020-21523 \u203c\n\nA Server-Side Freemarker template injection vulnerability in halo CMS v1.1.3 In the Edit Theme File function. The ftl file can be edited. This is the Freemarker template file. This file can cause arbitrary code execution when it is rendered in the background. exp: <#assign test=\"freemarker.template.utility.Execute\"?new()> ${test(\"touch /tmp/freemarkerPwned\")}\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2020-09-30T22:52:15.000000Z"} 2020-09-30T22:52:15+00:00