# CVE-2018-18845: Cross-site scripting in n/a

> Reflected XSS in Advanced Comment System allows remote attackers to execute malicious scripts in victim browsers via the ACS_path parameter.

- **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:** 17 Mar 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-p995-58rj-543m

## What is CVE-2018-18845?

CVE-2018-18845 is a medium-severity cross-site scripting vulnerability in n/a, published on 17 Mar 2019. 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

internal/advanced_comment_system/index.php and internal/advanced_comment_system/admin.php in Advanced Comment System, version 1.0, contain a reflected cross-site scripting vulnerability via ACS_path. A remote unauthenticated attacker could potentially exploit this vulnerability to supply malicious HTML or JavaScript code to a vulnerable web application, which is then reflected back to the victim and executed by the web browser. The product is discontinued.

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

## Which versions are affected by CVE-2018-18845?

It affects 1 product.


Products: Advanced Comment System Project Advanced Comment System.

## How do I fix CVE-2018-18845?

No fix has been published for CVE-2018-18845 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-18845 being exploited?

There is no known exploitation of CVE-2018-18845 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-18619](https://insights.sbomify.com/CVE-2018-18619/): SQL injection in n/a (critical 9.8)
- [CVE-2020-35598](https://insights.sbomify.com/CVE-2020-35598/): Path traversal in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-18845 and fix it if it is affected.

What it is: CVE-2018-18845 is a medium-severity cross-site scripting vulnerability in n/a, published on 17 Mar 2019. 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-2018-18845 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-2018-18845/ (Markdown: https://insights.sbomify.com/CVE-2018-18845/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-18845
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-18845
- OSV: https://osv.dev/vulnerability/CVE-2018-18845

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-18845/
Summaries are generated and may contain mistakes; the official description above is the record.