# CVE-2020-18305: Missing authorization in n/a

> Attackers can access sensitive information or escalate privileges via unrestricted URL access in the Extreme Networks EXOS Web GUI.

- **Severity:** High 8.0 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 May 2024
- **Updated:** 13 Feb 2025
- **Also known as:** GHSA-g9vx-vfc5-9mgj

## What is CVE-2020-18305?

CVE-2020-18305 is a high-severity missing authorization vulnerability in n/a, published on 13 May 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Extreme Networks EXOS before v.22.7 and before v.30.2 was discovered to contain an issue in its Web GUI which fails to restrict URL access, allowing attackers to access sensitive information or escalate privileges.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2020-18305?

It affects 1 product.


Products: Extremenetworks Extremexos.

## How do I fix CVE-2020-18305?

No fix has been published for CVE-2020-18305 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-18305 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-18305 exists.

## Other vulnerabilities in n/a

- [CVE-2024-27453](https://insights.sbomify.com/CVE-2024-27453/): Privilege escalation in n/a (high 8.6)
- [CVE-2017-14332](https://insights.sbomify.com/CVE-2017-14332/): Information disclosure in n/a (high 8.1)
- [CVE-2017-14328](https://insights.sbomify.com/CVE-2017-14328/): Memory corruption in n/a (high 7.5)
- [CVE-2017-14329](https://insights.sbomify.com/CVE-2017-14329/): Privilege escalation in n/a (medium 6.7)
- [CVE-2017-14330](https://insights.sbomify.com/CVE-2017-14330/): Privilege escalation in n/a (medium 6.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-18305 and fix it if it is affected.

What it is: CVE-2020-18305 is a high-severity missing authorization vulnerability in n/a, published on 13 May 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-18305 exists.

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-2020-18305/ (Markdown: https://insights.sbomify.com/CVE-2020-18305/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-18305
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-18305
- OSV: https://osv.dev/vulnerability/CVE-2020-18305

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-18305/
Summaries are generated and may contain mistakes; the official description above is the record.