CVE-2021-29116

Name: CVE-2021-29116
Creator: NVD / NIST
Published: 2021-12-07T11:15:08.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.78%

Last modified Jun 17, 2026

CVE-2021-29116 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A stored Cross Site Scripting (XSS) vulnerability in Esri ArcGIS Server feature services versions 10.8.1 and 10.9 (only) feature services may allow a remote, unauthenticated attacker to pass and store malicious strings via crafted queries which when accessed could potentially execute arbitrary JavaScript code in the user’s browser.. EPSS estimates a 0.78% chance of exploitation in the next 30 days.

Description

A stored Cross Site Scripting (XSS) vulnerability in Esri ArcGIS Server feature services versions 10.8.1 and 10.9 (only) feature services may allow a remote, unauthenticated attacker to pass and store malicious strings via crafted queries which when accessed could potentially execute arbitrary JavaScript code in the user’s browser.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.78%

51.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Esri	Arcgis Server	10.8.1
Esri	Arcgis Server	10.9.0

References

Timeline

Published: Dec 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29116?

How severe is CVE-2021-29116?

CVE-2021-29116 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.78% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29116?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-29116?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST