CVEvulnerability

CVE-2021-26829

5.4 MEDIUM Known exploited Published 2021-06-11 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

OpenPLC ScadaBR Cross-site Scripting Vulnerability — OpenPLC ScadaBR

OpenPLC ScadaBR contains a cross-site scripting vulnerability via system_settings.shtm.

Added to KEV
2025-11-28
Remediation due
2025-12-19
Ransomware use
Unknown
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/SCADA-LTS/Scada-LTS/pull/3211 ; https://nvd.nist.gov/vuln/detail/CVE-2021-26829
Status
Analyzed
Published
2021-06-11
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0 ([email protected])
3.5 LOW — AV:N/AC:M/Au:S/C:N/I:P/A:N
Weaknesses
CWE-79

Description

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

Affected configurations

• scadabr scadabr (<= 0.9.1) • scadabr scadabr (<= 1.12.4)

Related

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References