How severe is CVE-2021-35238?

CVE-2021-35238 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-35238 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35238?

CVE-2021-35238 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-2021-35238?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-35238 published?

CVE-2021-35238 was published on 2021-09-01 and last updated on 2026-06-17.

CVE-2021-35238

CVE-2021-35238 is a medium-severity vulnerability in Solarwinds Orion Platform with a CVSS 3.x base score of 4.8. 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: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Solarwinds Orion Platform
Published: 2021-09-01
Last modified: 2026-06-17

Description

User with Orion Platform Admin Rights could store XSS through URL POST parameter in CreateExternalWebsite website.

Frequently asked questions

What is CVE-2021-35238?: User with Orion Platform Admin Rights could store XSS through URL POST parameter in CreateExternalWebsite website.
How severe is CVE-2021-35238?: CVE-2021-35238 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-35238 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35238?: CVE-2021-35238 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-2021-35238?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-35238 published?: CVE-2021-35238 was published on 2021-09-01 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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