CVE-2021-3199

Katalog CVE

CVSS 9.8 · Critical KEV · sudah dieksploitasi EPSS 19,4%

Kerentanan Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') pada onlyoffice document server. Skor CVSS 3.1 9.8 (Critical) menurut NVD. Masuk katalog KEV CISA pada 8 Oktober 2026, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

Directory traversal with remote code execution can occur in /upload in ONLYOFFICE Document Server before 5.6.3, when JWT is used, via a /.. sequence in an image upload parameter.

Rincian

Terbit di NVD

26 Januari 2021

Terakhir diubah

9 Oktober 2026

Status NVD

Analyzed

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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

EPSS (30 hari)

19,4% peluang dieksploitasi; lebih tinggi dari 97,3% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

ONLYOFFICE Docs Server Path Traversal Vulnerability

Masuk KEV

8 Oktober 2026

Tenggat CISA

11 Oktober 2026 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3199 pemerintah AS
• https://github.com/ONLYOFFICE/DocumentServer/blob/903fe5ab7a275bd69c3c3346af2d21cf87ebeabf/CHANGELOG.md#563 release notes · advisory pihak ketiga
• https://github.com/moehw/poc_exploits/tree/master/CVE-2021-3199/poc_uploadImageFile.py exploit · advisory pihak ketiga
• https://github.com/nola-milkin/poc_exploits/blob/master/CVE-2021-3199/poc_uploadImageFile.py exploit · advisory pihak ketiga