# CVE-2018-20634: Cross-site scripting in n/a

> Remote attackers can cause denial of service by injecting JavaScript into the First Name field of the Advance B2B Script.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Mar 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-fwvc-q372-xv7g

## What is CVE-2018-20634?

CVE-2018-20634 is a medium-severity cross-site scripting vulnerability in n/a, published on 20 Mar 2019. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

PHP Scripts Mall Advance B2B Script 2.1.4 allows remote attackers to cause a denial of service (changed Page structure) via JavaScript code in the First Name field.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2018-20634?

It affects 1 product.


Products: Advance B2b Script Project Advance B2b Script.

## How do I fix CVE-2018-20634?

No fix has been published for CVE-2018-20634 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-20634 being exploited?

There is no known exploitation of CVE-2018-20634 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2017-17602](https://insights.sbomify.com/CVE-2017-17602/): SQL injection in n/a (critical 9.8)
- [CVE-2018-20633](https://insights.sbomify.com/CVE-2018-20633/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2018-20632](https://insights.sbomify.com/CVE-2018-20632/): Cross-site scripting in n/a (medium 5.4)
- [CVE-2018-20635](https://insights.sbomify.com/CVE-2018-20635/): Path traversal in n/a (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-20634 and fix it if it is affected.

What it is: CVE-2018-20634 is a medium-severity cross-site scripting vulnerability in n/a, published on 20 Mar 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-20634 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-2018-20634/ (Markdown: https://insights.sbomify.com/CVE-2018-20634/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-20634
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-20634
- OSV: https://osv.dev/vulnerability/CVE-2018-20634

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-20634/
Summaries are generated and may contain mistakes; the official description above is the record.