# CVE-2021-23260: Stored XSS Vulnerability in File Name of the File Upload function

> Authenticated users can inject malicious scripts via file names in Crafter CMS, leading to XSS execution in other users' browsers.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 2 Dec 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-h94f-223c-f5mw

## What is CVE-2021-23260?

CVE-2021-23260 is a medium-severity cross-site scripting vulnerability in Crafter CMS, published on 2 Dec 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Authenticated users with Site roles may inject XSS scripts via file names that will execute in the browser for this and other users of the same site.

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

## Which versions are affected by CVE-2021-23260?

It affects 1 product.


Products: Craftercms Crafter Cms.

## How do I fix CVE-2021-23260?

No fix has been published for CVE-2021-23260 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-23260 being exploited?

There is no known exploitation of CVE-2021-23260 in the wild and no public exploit code.

## Other vulnerabilities in Crafter CMS

- [CVE-2017-15681](https://insights.sbomify.com/CVE-2017-15681/): Path Traversal in Crafter CMS Crafter Studio (critical 9.8)
- [CVE-2018-19907](https://insights.sbomify.com/CVE-2018-19907/): OS Command Injection in craftercms:crafter-studio (high 8.8)
- [CVE-2017-15683](https://insights.sbomify.com/CVE-2017-15683/): XML injection in Crafter CMS (high 8.6)
- [CVE-2017-15685](https://insights.sbomify.com/CVE-2017-15685/): XML Injection in Crafter CMS Crafter Studio 3.0.1 (high 8.6)
- [CVE-2021-23264](https://insights.sbomify.com/CVE-2021-23264/): Exposure of Resource to Wrong Sphere in org.craftercms:crafter-search (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-23260 and fix it if it is affected.

What it is: CVE-2021-23260 is a medium-severity cross-site scripting vulnerability in Crafter CMS, published on 2 Dec 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-23260 in the wild and no public exploit code.

Affected product: Crafter CMS. 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-2021-23260/ (Markdown: https://insights.sbomify.com/CVE-2021-23260/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-23260
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-23260
- OSV: https://osv.dev/vulnerability/CVE-2021-23260

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-23260/
Summaries are generated and may contain mistakes; the official description above is the record.