# CVE-2018-18991: Cross-site scripting in SCADA WebServer

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

- **Severity:** Medium 6.1 (`CVSS:3.0/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:** 4 Dec 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-jqm7-8wp8-pqg6

## What is CVE-2018-18991?

CVE-2018-18991 is a medium-severity cross-site scripting vulnerability in SCADA WebServer, published on 4 Dec 2018. 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

Reflected cross-site scripting (non-persistent) in SCADA WebServer (Versions prior to 2.03.0001) could allow an attacker to send a crafted URL that contains JavaScript, which can be reflected off the web application to the victim's browser.

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

## Which versions are affected by CVE-2018-18991?

It affects 1 product.


Products: Spidercontrol Scada Webserver.

## How do I fix CVE-2018-18991?

No fix has been published for CVE-2018-18991 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-18991 being exploited?

There is no known exploitation of CVE-2018-18991 in the wild and no public exploit code.

## Other vulnerabilities in SCADA WebServer

- [CVE-2017-12728](https://insights.sbomify.com/CVE-2017-12728/): Privilege escalation in SpiderControl SCADA Web Server (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-18991 and fix it if it is affected.

What it is: CVE-2018-18991 is a medium-severity cross-site scripting vulnerability in SCADA WebServer, published on 4 Dec 2018. 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-2018-18991 in the wild and no public exploit code.

Affected product: SCADA WebServer. 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-2018-18991/ (Markdown: https://insights.sbomify.com/CVE-2018-18991/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-18991
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-18991
- OSV: https://osv.dev/vulnerability/CVE-2018-18991

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-18991/
Summaries are generated and may contain mistakes; the official description above is the record.