How severe is CVE-2021-29107?

CVE-2021-29107 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-29107 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29107?

CVE-2021-29107 affects Esri Arcgis Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-29107?

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

When was CVE-2021-29107 published?

CVE-2021-29107 was published on 2021-07-10 and last updated on 2026-06-17.

CVE-2021-29107

CVE-2021-29107 is a medium-severity vulnerability in Esri Arcgis Server with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Esri Arcgis Server
Published: 2021-07-10
Last modified: 2026-06-17

Description

A stored Cross Site Scripting (XXS) vulnerability in ArcGIS Server Manager version 10.8.1 and below may allow a remote unauthenticated attacker to pass and store malicious strings in the ArcGIS Server Manager application.

Frequently asked questions

What is CVE-2021-29107?: A stored Cross Site Scripting (XXS) vulnerability in ArcGIS Server Manager version 10.8.1 and below may allow a remote unauthenticated attacker to pass and store malicious strings in the ArcGIS Server Manager application.
How severe is CVE-2021-29107?: CVE-2021-29107 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-29107 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29107?: CVE-2021-29107 affects Esri Arcgis Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-29107?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-29107 published?: CVE-2021-29107 was published on 2021-07-10 and last updated on 2026-06-17.

References

https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/arcgis-server-security-2021-update-1-patch/

Affected products (1)

cpe:2.3:a:esri:arcgis_server:10.6.1:*:*:*:*:*:x64:*

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