# CVE-2025-51403: Cross-site scripting in n/a

> Attackers can inject malicious scripts into the Alias Nick parameter, potentially executing arbitrary code or hijacking user sessions in Live Helper Chat.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Jul 2025
- **Updated:** 21 Jul 2025
- **Also known as:** GHSA-m4hp-gwc8-p3gj

## What is CVE-2025-51403?

CVE-2025-51403 is a medium-severity cross-site scripting vulnerability in n/a, published on 21 Jul 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 stored cross-site scripting (XSS) vulnerability in the department assignment editing module of of Live Helper Chat v4.60 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the Alias Nick parameter.

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

## Which versions are affected by CVE-2025-51403?

It affects 1 product.


Products: Livehelperchat Live Helper Chat.

## How do I fix CVE-2025-51403?

No fix has been published for CVE-2025-51403 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-51403 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-51403 exists.

Public exploit code:

- LiveHelperChat <=4.61 - Stored Cross Site Scripting (XSS) via Department Assignment Alias Nick Field (github_poc): https://github.com/Thewhiteevil/CVE-2025-51403
- LiveHelperChat 4.61 - Stored Cross Site Scripting (XSS) via Department Assignment Alias Nick Field (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2024-27516](https://insights.sbomify.com/CVE-2024-27516/): livehelperchat Server-Side Template Injection (critical 9.8)
- [CVE-2022-0935](https://insights.sbomify.com/CVE-2022-0935/): Host Header injection in password Reset in livehelperchat/livehelperchat (high 8.8)
- [CVE-2022-1234](https://insights.sbomify.com/CVE-2022-1234/): XSS in livehelperchat in livehelperchat/livehelperchat (high 8.8)
- [CVE-2022-1191](https://insights.sbomify.com/CVE-2022-1191/): SSRF on index.php/cobrowse/proxycss/ in livehelperchat/livehelperchat (high 8.7)
- [CVE-2022-1213](https://insights.sbomify.com/CVE-2022-1213/): SSRF filter bypass port 80, 433 in livehelperchat/livehelperchat (high 7.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-51403 and fix it if it is affected.

What it is: CVE-2025-51403 is a medium-severity cross-site scripting vulnerability in n/a, published on 21 Jul 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-2025-51403 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-2025-51403/ (Markdown: https://insights.sbomify.com/CVE-2025-51403/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-51403
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-51403
- OSV: https://osv.dev/vulnerability/CVE-2025-51403

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-51403/
Summaries are generated and may contain mistakes; the official description above is the record.