Overview
OpenPLC ScadaBR contains an unrestricted upload of file with dangerous type vulnerability that allows remote authenticated users to upload and execute arbitrary JSP files via view_edit.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/2174 ; https://nvd.nist.gov/vuln/detail/CVE-2021-26828
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2021-26828 |
| Vendor / Product | OpenPLC — ScadaBR |
| NVD Published | 2021-06-11 |
| NVD Last Modified | 2025-12-04 |
| CVSS 3.1 Score | 8.8 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Severity | HIGH |
| CWE | CWE-434 |
| CISA KEV Added | 2025-12-03 |
| CISA KEV Deadline | 2025-12-24 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2025-12-24.
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 |
|---|---|
| 2025-12-03 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2025-12-24 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2021-26828 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |