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CVE-2021-35240

MEDIUM
Published 2021-08-31T15:57:21
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Expert Analysis

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CVSS Score

V3.1
6.5
/10
CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:L/A:L
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.002
probability
of exploitation in the wild

There is a 0.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.383
Higher than 38.3% of all CVEs

Attack Vector Metrics

Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
LOW
Availability
LOW

Description

A security researcher stored XSS via a Help Server setting. This affects customers using Internet Explorer, because they do not support 'rel=noopener'.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

SolarWinds

Orion Platform

Affected Versions:

2020.2.6 and previous versions

EU Vulnerability Database

Monitored by ENISA for EU cybersecurity

EU Coordination

Not EU Coordinated

Exploitation Status

No Known Exploitation

EUVD ID

View on ENISA

ENISA Analysis

Malicious code in bioql (PyPI)

Affected Products (ENISA)

solarwinds
orion platform

ENISA Scoring

CVSS Score (3.1)

6.5
/10
CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:L/A:L

EPSS Score

0.250
probability

ENISA References

https://documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htm
https://support.solarwinds.com/SuccessCenter/s/article/Orion-Platform-2020-2-6-Hotfix-1?language=en_US
https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35240
https://support.solarwinds.com/SuccessCenter/s/article/Mitigate-the-Stored-XSS-via-Help-Server-setting-CVE-2021-35240?language=en_US

Data provided by ENISA EU Vulnerability Database. Last updated: October 3, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-ch69-82p3-hfw4

Advisory Details

A security researcher stored XSS via a Help Server setting. This affects customers using Internet Explorer, because they do not support 'rel=noopener'.

CVSS Scoring

CVSS Score

5.0

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-35240
WEB https://documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htm
WEB https://support.solarwinds.com/SuccessCenter/s/article/Mitigate-the-Stored-XSS-via-Help-Server-setting-CVE-2021-35240?language=en_US
WEB https://support.solarwinds.com/SuccessCenter/s/article/Orion-Platform-2020-2-6-Hotfix-1?language=en_US
WEB https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35240

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: May 24, 2022

References

https://documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htm
https://support.solarwinds.com/SuccessCenter/s/article/Orion-Platform-2020-2-6-Hotfix-1?language=en_US
https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35240
https://support.solarwinds.com/SuccessCenter/s/article/Mitigate-the-Stored-XSS-via-Help-Server-setting-CVE-2021-35240?language=en_US
Published: 2021-08-31T15:57:21
Last Modified: 2024-08-04T00:33:51.240Z
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