CVE-2021-26829

5.4 MEDIUM CISA KEV - Actively Exploited

Published: June 11, 2021 Modified: December 01, 2025

View on NVD

Description

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

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4

Source: cve@mitre.org

Vendor Advisory

https://youtu.be/Xh6LPCiLMa8

Source: cve@mitre.org

Exploit Third Party Advisory

http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://youtu.be/Xh6LPCiLMa8

Source: af854a3a-2127-422b-91ae-364da2661108

Exploit Third Party Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26829

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

https://www.forescout.com/blog/anatomy-of-a-hacktivist-attack-russian-aligned-group-targets-otics/

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Third Party Advisory

6 reference(s) from NVD

Quick Stats

CVSS v3 Score

5.4 / 10.0

EPSS (Exploit Probability)

17.4%

95th percentile

Exploitation Status

Actively Exploited

Remediation due: 2025-12-19

Weaknesses (CWE)

CWE-79 CWE-79

Affected Vendors

scadabr linux microsoft

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