# CVE-2020-3267: Cisco Unified Contact Center Express Improper API Authorization Vulnerability

> An authenticated attacker can change any agent's availability state via API, potentially causing denial of service in Cisco Unified CCX.

- **Severity:** Medium 5.4 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Jun 2020
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-9vch-84p9-292x

## What is CVE-2020-3267?

CVE-2020-3267 is a medium-severity missing authorization vulnerability in Cisco Unified Contact Center Express, published on 3 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in the API subsystem of Cisco Unified Contact Center Express (Unified CCX) could allow an authenticated, remote attacker to change the availability state of any agent. The vulnerability is due to insufficient authorization enforcement on an affected system. An attacker could exploit this vulnerability by authenticating to an affected system with valid agent credentials and performing a specific API call with crafted input. A successful exploit could allow the attacker to change the availability state of an agent, potentially causing a denial of service condition.

Weakness: CWE-552 (Files or Directories Accessible to External Parties), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2020-3267?

It affects 1 product.


Products: Cisco Unified Contact Center Express.

## How do I fix CVE-2020-3267?

No fix has been published for CVE-2020-3267 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3267 being exploited?

There is no known exploitation of CVE-2020-3267 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Unified Contact Center Express

- [CVE-2025-20354](https://insights.sbomify.com/CVE-2025-20354/): Cisco Unified Contact Center Express Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2020-3280](https://insights.sbomify.com/CVE-2020-3280/): Cisco Unified Contact Center Express Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2018-0403](https://insights.sbomify.com/CVE-2018-0403/): Information disclosure in Cisco Unified Contact Center Express unknown (critical 9.8)
- [CVE-2022-20658](https://insights.sbomify.com/CVE-2022-20658/): Privilege escalation in Cisco Unified Contact Center Domain Manager (critical 9.6)
- [CVE-2025-20358](https://insights.sbomify.com/CVE-2025-20358/): Cisco Unified Contact Center Express Editor Authentication Bypass Vulnerability (critical 9.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3267 and fix it if it is affected.

What it is: CVE-2020-3267 is a medium-severity missing authorization vulnerability in Cisco Unified Contact Center Express, published on 3 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-3267 in the wild and no public exploit code.

Affected product: Cisco Unified Contact Center Express. 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-2020-3267/ (Markdown: https://insights.sbomify.com/CVE-2020-3267/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3267
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3267
- OSV: https://osv.dev/vulnerability/CVE-2020-3267

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-3267/
Summaries are generated and may contain mistakes; the official description above is the record.