# CVE-2020-8209: Path traversal in Citrix XenMobile Server

> An attacker can read arbitrary files from the server due to improper access control in Citrix XenMobile Server.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Aug 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-fx75-7xmm-5hm3

## What is CVE-2020-8209?

CVE-2020-8209 is a high-severity path traversal vulnerability in Citrix XenMobile Server, published on 17 Aug 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper access control in Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP6 and Citrix XenMobile Server before 10.9 RP5 and leads to the ability to read arbitrary files.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2020-8209?

It affects 1 product.


Products: Citrix Xenmobile Server.

## How do I fix CVE-2020-8209?

No fix has been published for CVE-2020-8209 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-8209 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-8209 exists.

Public exploit code:

- 该脚本为Citrix XenMobile 目录遍历漏洞（CVE-2020-8209）批量检测脚本。 (github_poc): https://github.com/B1anda0/CVE-2020-8209
- Citrix XenMobile Server - Local File Inclusion (nuclei): http/cves/2020/CVE-2020-8209.yaml

## Other vulnerabilities in Citrix XenMobile Server

- [CVE-2020-8211](https://insights.sbomify.com/CVE-2020-8211/): SQL injection in Citrix XenMobile Server (critical 9.8)
- [CVE-2020-8212](https://insights.sbomify.com/CVE-2020-8212/): Missing authorization in Citrix XenMobile Server (critical 9.8)
- [CVE-2018-10648](https://insights.sbomify.com/CVE-2018-10648/): File upload in n/a (critical 9.8)
- [CVE-2018-10653](https://insights.sbomify.com/CVE-2018-10653/): XML external entity in n/a (critical 9.8)
- [CVE-2018-18571](https://insights.sbomify.com/CVE-2018-18571/): Auth bypass in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-8209 and fix it if it is affected.

What it is: CVE-2020-8209 is a high-severity path traversal vulnerability in Citrix XenMobile Server, published on 17 Aug 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-8209 exists.

Affected product: Citrix XenMobile 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-2020-8209/ (Markdown: https://insights.sbomify.com/CVE-2020-8209/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8209
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8209
- OSV: https://osv.dev/vulnerability/CVE-2020-8209

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-8209/
Summaries are generated and may contain mistakes; the official description above is the record.