CVE-2020-21523

Katalog CVE

CVSS 9.8 · Critical EPSS 2,6%

Kerentanan Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') pada halo. Skor CVSS 3.1 9.8 (Critical) menurut NVD.

Deskripsi (NVD)

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")}

Rincian

Terbit di NVD

30 September 2020

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

9.8 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

EPSS (30 hari)

2,6% peluang dieksploitasi; lebih tinggi dari 84,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/halo-dev/halo/issues/419 exploit · issue tracking · advisory pihak ketiga