How severe is CVE-2021-29105?

CVE-2021-29105 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-29105 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29105?

CVE-2021-29105 affects Esri Arcgis Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-29105?

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

When was CVE-2021-29105 published?

CVE-2021-29105 was published on 2021-07-11 and last updated on 2026-06-17.

CVE-2021-29105

CVE-2021-29105 is a medium-severity vulnerability in Esri Arcgis Server with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Esri Arcgis Server
Published: 2021-07-11
Last modified: 2026-06-17

Description

A stored Cross Site Scripting (XSS) vulnerability in Esri ArcGIS Server Services Directory version 10.8.1 and below may allow a remote authenticated attacker to pass and store malicious strings in the ArcGIS Services Directory.

Frequently asked questions

What is CVE-2021-29105?: A stored Cross Site Scripting (XSS) vulnerability in Esri ArcGIS Server Services Directory version 10.8.1 and below may allow a remote authenticated attacker to pass and store malicious strings in the ArcGIS Services Directory.
How severe is CVE-2021-29105?: CVE-2021-29105 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-29105 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29105?: CVE-2021-29105 affects Esri Arcgis Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-29105?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-29105 published?: CVE-2021-29105 was published on 2021-07-11 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:*:*:*:*:*:*:x64:*

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