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VULNERABILITIES

CVE-2021-26829 Details

Description

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

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CNA: CISA-ADPCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26829 CISA-ADPUS Government Resource
https://www.forescout.com/blog/anatomy-of-a-hacktivist-attack-russian-aligned-group-targets-otics/ CISA-ADPThird Party Advisory
http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4 CVEVendor Advisory
https://youtu.be/Xh6LPCiLMa8 CVEExploitThird Party Advisory
http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4 [email protected]Vendor Advisory

see all 6 references

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability NameDate AddedDue DateRequired Action
OpenPLC ScadaBR Cross-site Scripting VulnerabilityNov 28, 2025Dec 19, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weakness Enumeration

CWE-IDCWE NameSource
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')[email protected]
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CISA-ADP

Affected Products

ProductVersions
scadabr scadabr
<= 0.9.1
<= 1.12.4

CPE

  • cpe:2.3:a:scadabr:scadabr:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
linux linux kernel
All versions

CPE

  • cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
microsoft windows
All versions

CPE

  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-26829
NVD Published Date:
Jun 11, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-26829 Details - Not Deferred