# CVE-2025-12101: Cross-Site Scripting (XSS)

> Attackers can execute scripts in NetScaler Gateway or AAA virtual server configurations, potentially compromising user sessions.

- **Severity:** Medium 5.9 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L`)
- **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:** 11 Nov 2025
- **Updated:** 12 Nov 2025
- **Also known as:** GHSA-jcjw-279r-m433

## What is CVE-2025-12101?

CVE-2025-12101 is a medium-severity cross-site scripting vulnerability in NetScaler ADC, published on 11 Nov 2025. 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

Cross-Site Scripting (XSS) in NetScaler ADC and NetScaler Gateway when the appliance is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server

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

## Which versions are affected by CVE-2025-12101?


## How do I fix CVE-2025-12101?

No fix has been published for CVE-2025-12101 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-12101 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-12101 exists.

Public exploit code:

- Simple Python PoC to check Citrix NetScaler ADC/Gateway for CVE-2025-12101 reflected XSS on /cgi/logout using a crafted SAMLResponse + RelayState payload (github_poc): https://github.com/6h4ack/CVE-2025-12101-checker
- https://github.com/boneys/CVE-2025-12101-Scanner-PoC (github_poc): https://github.com/boneys/CVE-2025-12101-Scanner-PoC
- Citrix NetScaler ADC & Gateway - Reflected XSS / Open Redirect (nuclei)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-12101 and fix it if it is affected.

What it is: CVE-2025-12101 is a medium-severity cross-site scripting vulnerability in NetScaler ADC, published on 11 Nov 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-12101 exists.

Affected product: NetScaler ADC. 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-2025-12101/ (Markdown: https://insights.sbomify.com/CVE-2025-12101/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-12101
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-12101
- OSV: https://osv.dev/vulnerability/CVE-2025-12101

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-12101/
Summaries are generated and may contain mistakes; the official description above is the record.