# CVE-2020-8245: Cross-site scripting in Citrix ADC, Citrix Gateway

> Attackers can inject HTML into the SSL VPN web portal, potentially leading to session hijacking or malicious script execution.

- **Severity:** Medium 6.1 (`CVSS:3.1/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:** 18 Sep 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-62vx-hh36-4mpq

## What is CVE-2020-8245?

CVE-2020-8245 is a medium-severity cross-site scripting vulnerability in Citrix ADC, Citrix Gateway, published on 18 Sep 2020. 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

Improper Input Validation on Citrix ADC and Citrix Gateway 13.0 before 13.0-64.35, Citrix ADC and NetScaler Gateway 12.1 before 12.1-58.15, Citrix ADC 12.1-FIPS before 12.1-55.187, Citrix ADC and NetScaler Gateway 12.0, Citrix ADC and NetScaler Gateway 11.1 before 11.1-65.12, Citrix SD-WAN WANOP 11.2 before 11.2.1a, Citrix SD-WAN WANOP 11.1 before 11.1.2a, Citrix SD-WAN WANOP 11.0 before 11.0.3f, Citrix SD-WAN WANOP 10.2 before 10.2.7b leads to an HTML Injection attack against the SSL VPN web portal.

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

## Which versions are affected by CVE-2020-8245?

It affects 3 products.


Products: Citrix Application Delivery Controller Firmware, Citrix Gateway, Citrix Netscaler Gateway.

## How do I fix CVE-2020-8245?

No fix has been published for CVE-2020-8245 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-8245 being exploited?

There is no known exploitation of CVE-2020-8245 in the wild and no public exploit code.

## Other vulnerabilities in Citrix ADC, Citrix Gateway

- [CVE-2022-27518](https://insights.sbomify.com/CVE-2022-27518/): Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-19781](https://insights.sbomify.com/CVE-2019-19781/): Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution (critical 9.8, exploited in the wild)
- [CVE-2020-8193](https://insights.sbomify.com/CVE-2020-8193/): Citrix ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass (medium 6.5, exploited in the wild)
- [CVE-2020-8195](https://insights.sbomify.com/CVE-2020-8195/): Citrix ADC, Gateway, and SD-WAN WANOP Appliance Information Disclosure (medium 6.5, exploited in the wild)
- [CVE-2020-8196](https://insights.sbomify.com/CVE-2020-8196/): Citrix ADC, Gateway, and SD-WAN WANOP Appliance Information Disclosure (medium 4.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-8245 and fix it if it is affected.

What it is: CVE-2020-8245 is a medium-severity cross-site scripting vulnerability in Citrix ADC, Citrix Gateway, published on 18 Sep 2020. 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-2020-8245 in the wild and no public exploit code.

Affected product: Citrix ADC, Citrix Gateway. 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-2020-8245/ (Markdown: https://insights.sbomify.com/CVE-2020-8245/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8245
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8245
- OSV: https://osv.dev/vulnerability/CVE-2020-8245

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-8245/
Summaries are generated and may contain mistakes; the official description above is the record.