CVE-2021-26829 is a vulnerability in Openplcproject Scadabr
Published on June 11, 2021
OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.
Known Exploited Vulnerability
This OpenPLC ScadaBR Cross-site Scripting Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. OpenPLC ScadaBR contains a cross-site scripting vulnerability via system_settings.shtm.
The following remediation steps are recommended / required by December 19, 2025: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vulnerability Analysis
CVE-2021-26829 can be exploited with network access, requires user interaction and a small amount of user privileges. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2021-26829 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2021-26829
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Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.