CVE-2021-21254: ckeditor5

csirt@kutim:~/threat-intel/cve/CVE-2021-21254

CVSS 6.5 · Medium EPSS 1,8%

Kerentanan Uncontrolled Resource Consumption pada ckeditor5. Skor CVSS 3.1 6.5 (Medium) menurut NVD.

Deskripsi (NVD)

CKEditor 5 is an open source rich text editor framework with a modular architecture. The CKEditor 5 Markdown plugin (@ckeditor/ckeditor5-markdown-gfm) before version 25.0.0 has a regex denial of service (ReDoS) vulnerability. The vulnerability allowed to abuse link recognition regular expression, which could cause a significant performance drop resulting in browser tab freeze. It affects all users using CKEditor 5 Markdown plugin at version <= 24.0.0. The problem has been recognized and patched. The fix will be available in version 25.0.0.

Rincian

Terbit di NVD: 29 Januari 2021
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 6.5 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-400: Uncontrolled Resource Consumption
EPSS (30 hari): 1,8% peluang dieksploitasi; lebih tinggi dari 77,8% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
ckeditor	ckeditor5	Semua versi sebelum 25.0.0

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/ckeditor/ckeditor5/releases/tag/v25.0.0 release notes · advisory pihak ketiga
https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-hgmg-hhc8-g5wr advisory pihak ketiga
https://www.npmjs.com/package/%40ckeditor/ckeditor5-markdown-gfm

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:10 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.