SolarWinds Platform (Orion)
CVE-2021-35240: Stored XSS via Help Server settings
A security researcher stored XSS via a Help Server setting.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 3.1 6.5
EPSS1.1%Chance of exploitation in 30 days
Public exploitNot tracked
FixAvailable
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Orion Platform (Windows) 2020.2 | 2020.2.6 HF1 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A security researcher stored XSS via a Help Server setting. This affects customers using Internet Explorer, because they do not support 'rel=noopener'.
Workarounds
If you are unable to upgrade immediately. See SolarWinds Knowledgebase Article Below: https://support.solarwinds.com/SuccessCenter/s/article/Mitigate-the-Stored-XSS-via-Help-Server-setting-CVE-2021-35240?language=en_US
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.