# CVE-2018-1000521: Cross-site scripting in n/a

> Low-privileged users can execute XSS attacks against high-privileged developers in BigTree CMS, potentially leading to account takeover.

- **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:** 26 Jun 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-xp45-33wm-mg9r

## What is CVE-2018-1000521?

CVE-2018-1000521 is a medium-severity cross-site scripting vulnerability in n/a, published on 26 Jun 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

BigTree-CMS contains a Cross Site Scripting (XSS) vulnerability in /users/create that can result in The low-privileged users can use this vulnerability to attack high-privileged(Developer) users.. This attack appear to be exploitable via no. This vulnerability appears to have been fixed in after commit b652cfdc14d0670c81ac4401ad5a04376745c279.

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

## Which versions are affected by CVE-2018-1000521?

It affects 1 product.


Products: Bigtreecms Bigtree Cms.

## How do I fix CVE-2018-1000521?

No fix has been published for CVE-2018-1000521 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-1000521 being exploited?

There is no known exploitation of CVE-2018-1000521 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-10574](https://insights.sbomify.com/CVE-2018-10574/): File upload in n/a (critical 9.8)
- [CVE-2017-9364](https://insights.sbomify.com/CVE-2017-9364/): File upload in n/a (critical 9.8)
- [CVE-2017-7695](https://insights.sbomify.com/CVE-2017-7695/): File upload in n/a (critical 9.8)
- [CVE-2020-26668](https://insights.sbomify.com/CVE-2020-26668/): SQL injection in n/a (high 8.8)
- [CVE-2020-26670](https://insights.sbomify.com/CVE-2020-26670/): Command injection in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-1000521 and fix it if it is affected.

What it is: CVE-2018-1000521 is a medium-severity cross-site scripting vulnerability in n/a, published on 26 Jun 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-2018-1000521 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-2018-1000521/ (Markdown: https://insights.sbomify.com/CVE-2018-1000521/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1000521
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1000521
- OSV: https://osv.dev/vulnerability/CVE-2018-1000521

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-1000521/
Summaries are generated and may contain mistakes; the official description above is the record.