CVEvulnerability

CVE-2020-21523

9.8 CRITICAL Published 2020-09-30 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-09-30
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
10.0 HIGH — AV:N/AC:L/Au:N/C:C/I:C/A:C
Weaknesses
CWE-74

Description

A 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")}

Affected configurations

• halo halo 1.1.3

Related

Weakness · CWE (1)

  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component weakness

References