# CVE-2025-63639: Cross-site scripting in n/a

> Attackers can inject malicious scripts into chat messages, executing code in victims' browsers to potentially steal sessions or data.

- **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:** 7 Nov 2025
- **Updated:** 12 Nov 2025
- **Also known as:** GHSA-ghg3-c9m4-3hc2

## What is CVE-2025-63639?

CVE-2025-63639 is a medium-severity cross-site scripting vulnerability in n/a, published on 7 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

The chat feature in the application Sourcecodester FAQ Bot with AI Assistant v1.0 is vulnerable to Cross-Site Scripting (XSS) due to improper handling of user-supplied input. An attacker can inject malicious HTML or JavaScript into chat messages, which executes in the browser of any user viewing the conversation.

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

## Which versions are affected by CVE-2025-63639?

It affects 1 product.


Products: Remyandrade Faq Bot With Ai Assistant.

## How do I fix CVE-2025-63639?

No fix has been published for CVE-2025-63639 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-63639 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63639 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-63639 and fix it if it is affected.

What it is: CVE-2025-63639 is a medium-severity cross-site scripting vulnerability in n/a, published on 7 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-2025-63639 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-2025-63639/ (Markdown: https://insights.sbomify.com/CVE-2025-63639/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-63639
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-63639
- OSV: https://osv.dev/vulnerability/CVE-2025-63639

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-63639/
Summaries are generated and may contain mistakes; the official description above is the record.