CVE-2021-26829 — OpenPLC ScadaBR Cross-site Scripting Vulnerability
CVE-2021-26829: OpenPLC ScadaBR Cross-site Scripting Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | OpenPLC |
| Product | ScadaBR |
| Date added | 2025-11-28 |
| Due date | 2025-12-19 |
| Ransomware campaign use | Unknown |
Description
OpenPLC ScadaBR contains a cross-site scripting vulnerability via system_settings.shtm.
Required action (CISA)
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
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26829
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog