CVE-2021-26829

Katalog CVE

CVSS 5.4 · Medium KEV · sudah dieksploitasi EPSS 48,1%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada scadabr. Skor CVSS 3.1 5.4 (Medium) menurut NVD. Masuk katalog KEV CISA pada 28 November 2025, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.

Rincian

Terbit di NVD

11 Juni 2021

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

5.4 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

EPSS (30 hari)

48,1% peluang dieksploitasi; lebih tinggi dari 98,8% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

OpenPLC ScadaBR Cross-site Scripting Vulnerability

Masuk KEV

28 November 2025

Tenggat CISA

19 Desember 2025 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4 advisory vendor
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26829 pemerintah AS
• https://youtu.be/Xh6LPCiLMa8 exploit · advisory pihak ketiga
• https://www.forescout.com/blog/anatomy-of-a-hacktivist-attack-russian-aligned-group-targets-otics/ advisory pihak ketiga