How severe is CVE-2021-35239?

CVE-2021-35239 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2021-35239 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35239?

CVE-2021-35239 primarily affects Solarwinds Orion Platform. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-35239?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-35239 published?

CVE-2021-35239 was published on 2021-08-31 and last updated on 2026-06-17.

CVE-2021-35239

CVE-2021-35239 is a high-severity vulnerability in Solarwinds Orion Platform with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 3.5
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Solarwinds Orion Platform
Published: 2021-08-31
Last modified: 2026-06-17

Description

A security researcher found a user with Orion map manage rights could store XSS through via text box hyperlink.

Frequently asked questions

What is CVE-2021-35239?: A security researcher found a user with Orion map manage rights could store XSS through via text box hyperlink.
How severe is CVE-2021-35239?: CVE-2021-35239 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2021-35239 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35239?: CVE-2021-35239 primarily affects Solarwinds Orion Platform. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-35239?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-35239 published?: CVE-2021-35239 was published on 2021-08-31 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:solarwinds:orion_platform:*:*:*:*:*:*:*:*
cpe:2.3:a:solarwinds:orion_platform:2020.2.6:-:*:*:*:*:*:*

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