Overview
OpenPLC ScadaBR contains a cross-site scripting vulnerability via system_settings.shtm.
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
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2021-26829 |
| Vendor / Product | OpenPLC — ScadaBR |
| NVD Published | 2021-06-11 |
| NVD Last Modified | 2025-12-01 |
| CVSS 3.1 Score | 5.4 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| Severity | MEDIUM |
| CWE | CWE-79 |
| CISA KEV Added | 2025-11-28 |
| CISA KEV Deadline | 2025-12-19 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Required Action
CISA BOD 22-01 Deadline: 2025-12-19.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Timeline
| Date | Event |
|---|---|
| 2025-11-28 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2025-12-19 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2021-26829 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |