# CVE-2025-63589: Cross-site scripting in n/a

> Reflected XSS in CMSimple_XH allows attackers to execute arbitrary JavaScript in victims' browsers via crafted URLs.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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:** 6 Nov 2025
- **Updated:** 6 Nov 2025
- **Also known as:** GHSA-vjvr-7hrq-r8p6

## What is CVE-2025-63589?

CVE-2025-63589 is a high-severity cross-site scripting vulnerability in n/a, published on 6 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

A reflected XSS vulnerability exists in CMSimple_XH 1.8's index.php router when attacker-controlled path segments are not sanitized or encoded before being inserted into the generated HTML (navigation links, breadcrumbs, search form action, footer links). An attacker-controlled string placed in the URL path is reflected into multiple HTML elements, allowing execution of arbitrary JavaScript in victims' browsers visiting a crafted URL.

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

## Which versions are affected by CVE-2025-63589?

It affects 1 product.


Products: Cmsimple-Xh Cmsimple Xh.

## How do I fix CVE-2025-63589?

No fix has been published for CVE-2025-63589 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-63589 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63589 exists.

Public exploit code:

- https://github.com/cybercrewinc/CVE-2025-63589 (github_poc): https://github.com/cybercrewinc/CVE-2025-63589

## Other vulnerabilities in n/a

- [CVE-2021-42645](https://insights.sbomify.com/CVE-2021-42645/): File upload in n/a (critical 10.0)
- [CVE-2021-47736](https://insights.sbomify.com/CVE-2021-47736/): CMSimple_XH 1.7.4 Authenticated Remote Code Execution via Content Editing (high 8.6)
- [CVE-2025-63588](https://insights.sbomify.com/CVE-2025-63588/): Cross-site scripting in n/a (high 7.1)
- [CVE-2024-34452](https://insights.sbomify.com/CVE-2024-34452/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-63589 and fix it if it is affected.

What it is: CVE-2025-63589 is a high-severity cross-site scripting vulnerability in n/a, published on 6 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-2025-63589 exists.

Affected product: n/a. 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-2025-63589/ (Markdown: https://insights.sbomify.com/CVE-2025-63589/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-63589
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-63589
- OSV: https://osv.dev/vulnerability/CVE-2025-63589

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-63589/
Summaries are generated and may contain mistakes; the official description above is the record.