# CVE-2021-29107: There is a stored Cross Site Scripting (XXS) vulnerability in ArcGIS Server Manager version 10.8.1 and below.

> Remote unauthenticated attackers can inject malicious scripts into ArcGIS Server Manager, potentially leading to code execution or account takeover.

- **Severity:** Medium 6.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 10 Jul 2021
- **Updated:** 10 Apr 2025
- **Also known as:** GHSA-mrpc-fw56-g9jm

## What is CVE-2021-29107?

CVE-2021-29107 is a medium-severity cross-site scripting vulnerability in Esri Arcgis Server, published on 10 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-29107?

It affects 1 product.


Products: Esri Arcgis Server.

## How do I fix CVE-2021-29107?

No fix has been published for CVE-2021-29107 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-29107 being exploited?

There is no known exploitation of CVE-2021-29107 in the wild and no public exploit code.

## Other vulnerabilities in Esri Arcgis Server

- [CVE-2025-57870](https://insights.sbomify.com/CVE-2025-57870/): BUG-000179884 - There is a security vulnerability in ArcGIS Server Feature Services. (critical 10.0)
- [CVE-2026-9181](https://insights.sbomify.com/CVE-2026-9181/): Directory Traversal in ArcGIS Server (critical 9.8)
- [CVE-2026-9182](https://insights.sbomify.com/CVE-2026-9182/): Unvalidated File Upload vulnerability in ArcGIS Server. (critical 9.8)
- [CVE-2020-35712](https://insights.sbomify.com/CVE-2020-35712/): Server-side request forgery in n/a (critical 9.8)
- [CVE-2021-29102](https://insights.sbomify.com/CVE-2021-29102/): There is a Server-Side Request Forgery (SSRF) vulnerability in Esri ArcGIS Server Manager version 10.8.1 and below. (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-29107 and fix it if it is affected.

What it is: CVE-2021-29107 is a medium-severity cross-site scripting vulnerability in Esri Arcgis Server, published on 10 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-29107 in the wild and no public exploit code.

Affected product: Esri Arcgis Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-29107/ (Markdown: https://insights.sbomify.com/CVE-2021-29107/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-29107
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-29107
- OSV: https://osv.dev/vulnerability/CVE-2021-29107

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-29107/
Summaries are generated and may contain mistakes; the official description above is the record.