# CVE-2018-20724: Cross-site scripting in n/a

> An attacker can inject malicious scripts via the Website Hostname field in Cacti, potentially leading to session hijacking or code execution.

- **Severity:** Medium 4.8 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 16 Jan 2019
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-20724, GHSA-cqqq-p7hm-4wmf, UBUNTU-CVE-2018-20724

## What is CVE-2018-20724?

CVE-2018-20724 is a medium-severity cross-site scripting vulnerability in Cacti Cacti, published on 16 Jan 2019. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

A cross-site scripting (XSS) vulnerability exists in pollers.php in Cacti before 1.2.0 due to lack of escaping of unintended characters in the Website Hostname for Data Collectors.

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

## Which versions are affected by CVE-2018-20724?

It affects 1 product.


Products: Cacti Cacti.

## How do I fix CVE-2018-20724?

Upgrade to a fixed version.

## Is CVE-2018-20724 being exploited?

There is no known exploitation of CVE-2018-20724 in the wild and no public exploit code.

## Other vulnerabilities in Cacti Cacti

- [CVE-2022-46169](https://insights.sbomify.com/CVE-2022-46169/): Cacti Command Injection (critical 9.8, exploited in the wild)
- [CVE-2026-39893](https://insights.sbomify.com/CVE-2026-39893/): Cacti: Pre-authentication SQL injection via rfilter RLIKE clause in graph_view.php (critical 9.8)
- [CVE-2026-39938](https://insights.sbomify.com/CVE-2026-39938/): Cacti: Unauthenticated RCE on Graph Image (critical 9.8)
- [CVE-2026-39955](https://insights.sbomify.com/CVE-2026-39955/): Cacti has Pre-Authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php (critical 9.8)
- [CVE-2023-39361](https://insights.sbomify.com/CVE-2023-39361/): Unauthenticated SQL Injection in graph_view.php in Cacti (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-20724 and fix it if it is affected.

What it is: CVE-2018-20724 is a medium-severity cross-site scripting vulnerability in Cacti Cacti, published on 16 Jan 2019. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-20724 in the wild and no public exploit code.

Affected product: Cacti Cacti. 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-2018-20724/ (Markdown: https://insights.sbomify.com/CVE-2018-20724/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-20724
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-20724
- OSV: https://osv.dev/vulnerability/CVE-2018-20724

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-20724/
Summaries are generated and may contain mistakes; the official description above is the record.