CVE-2021-26829
MediumActively exploited (CISA KEV)
Description
OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.
SeverityMedium
CVSS5.4
Exploit probability—
ProductOpenPLC ScadaBR
PublishedJun 11, 2021
First seenJun 11, 2021
Added to KEVNov 28, 2025
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
CISA 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.
CISA due date: Dec 19, 2025Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| scadabr scadabr | v ≤ 0.9.1, v ≤ 1.12.4 | — |
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