CVE-2021-26829 | BDVDB-2026-155382 Detail

OpenPLCScadaBR

Description#

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

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References#

Exploit#

No public exploit known

History#

Version 12021-06-11Record published in the CVE List.
Version 22025-12-02Most recent update recorded in the CVE List.

Published

Published: 2021-06-11
Last modified: 2025-12-02

Vendor information

Vendor: OpenPLC
Product: ScadaBR

All OpenPLC vulnerabilities

Score

5.4 Medium

EPSS

48.0%, Moderate

Estimated chance of exploitation in the next 30 days. EPSS percentile: 98.9.

KEV

Yes

Listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Cross-Site Scripting

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.

Affected Systems

No version data in the source record.

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.4 Medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	Low
User Interaction	Required
Scope	Changed
Confidentiality	Low
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).