# CVE-2020-9758: Cross-site scripting in n/a

> Blind XSS in LiveZilla allows attackers to steal helpdesk credentials, leading to privilege escalation and full account takeover.

- **Severity:** Critical 9.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **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:** 9 Mar 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-m978-hcqw-jcmw

## What is CVE-2020-9758?

CVE-2020-9758 is a critical cross-site scripting vulnerability in n/a, published on 9 Mar 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

An issue was discovered in chat.php in LiveZilla Live Chat 8.0.1.3 (Helpdesk). A blind JavaScript injection lies in the name parameter. Triggering this can fetch the username and passwords of the helpdesk employees in the URI. This leads to a privilege escalation, from unauthenticated to user-level access, leading to full account takeover. The attack fetches multiple credentials because they are stored in the database (stored XSS). This affects the mobile/chat URI via the lgn and psswrd parameters.

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

## Which versions are affected by CVE-2020-9758?

It affects 1 product.


Products: Livezilla Livezilla.

## How do I fix CVE-2020-9758?

No fix has been published for CVE-2020-9758 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-9758 being exploited?

There is no known exploitation of CVE-2020-9758 in the wild and no public exploit code.

Public exploit code:

- Form submission for vulnerability in livezilla (github_poc): https://github.com/ari034/CVE-2020-9758

## Other vulnerabilities in n/a

- [CVE-2013-6225](https://insights.sbomify.com/CVE-2013-6225/): Path traversal in n/a (critical 9.8)
- [CVE-2019-12960](https://insights.sbomify.com/CVE-2019-12960/): SQL injection in n/a (critical 9.8)
- [CVE-2019-12939](https://insights.sbomify.com/CVE-2019-12939/): SQL injection in n/a (critical 9.8)
- [CVE-2019-12961](https://insights.sbomify.com/CVE-2019-12961/): Other in n/a (high 8.8)
- [CVE-2013-7034](https://insights.sbomify.com/CVE-2013-7034/): Deserialization in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-9758 and fix it if it is affected.

What it is: CVE-2020-9758 is a critical cross-site scripting vulnerability in n/a, published on 9 Mar 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-2020-9758 in the wild and no public exploit code.

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-2020-9758/ (Markdown: https://insights.sbomify.com/CVE-2020-9758/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-9758
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-9758
- OSV: https://osv.dev/vulnerability/CVE-2020-9758

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-9758/
Summaries are generated and may contain mistakes; the official description above is the record.