# CVE-2022-20633: Cisco Enterprise Chat and Email Username Enumeration Vulnerability

> Unauthenticated attackers can enumerate valid user accounts via authentication response differences, facilitating further targeted attacks.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Nov 2024
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-jvfw-53c8-p9qg

## What is CVE-2022-20633?

CVE-2022-20633 is a medium-severity vulnerability in Cisco Enterprise Chat and Email, published on 15 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the web-based management interface of Cisco ECE could allow an unauthenticated, remote attacker to perform a username enumeration attack against an affected device.

This vulnerability is due to differences in authentication responses that are sent back from the application as part of an authentication attempt. An attacker could exploit this vulnerability by sending authentication requests to an affected device. A successful exploit could allow the attacker to confirm existing user accounts, which could be used in further attacks.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Weakness: CWE-204 (Observable Response Discrepancy)

## Which versions are affected by CVE-2022-20633?

It affects 1 product.


Products: Cisco Enterprise Chat and Email.

## How do I fix CVE-2022-20633?

No fix has been published for CVE-2022-20633 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-20633 being exploited?

There is no known exploitation of CVE-2022-20633 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Enterprise Chat and Email

- [CVE-2025-20139](https://insights.sbomify.com/CVE-2025-20139/): Denial of service in Cisco Enterprise Chat and Email (high 7.5)
- [CVE-2024-20484](https://insights.sbomify.com/CVE-2024-20484/): Cisco Enterprise Chat and Email Denial of Service Vulnerability (high 7.5)
- [CVE-2019-1877](https://insights.sbomify.com/CVE-2019-1877/): Cisco Enterprise Chat and Email Attachment Download Vulnerability (medium 6.5)
- [CVE-2025-20310](https://insights.sbomify.com/CVE-2025-20310/): Cisco Enterprise Chat and Email Stored Cross-Site Scripting Vulnerability (medium 6.1)
- [CVE-2022-20631](https://insights.sbomify.com/CVE-2022-20631/): Cisco Enterprise Chat and Email Cross-Site Scripting Vulnerability (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-20633 and fix it if it is affected.

What it is: CVE-2022-20633 is a medium-severity vulnerability in Cisco Enterprise Chat and Email, published on 15 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-20633 in the wild and no public exploit code.

Affected product: Cisco Enterprise Chat and Email. 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-2022-20633/ (Markdown: https://insights.sbomify.com/CVE-2022-20633/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-20633
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-20633
- OSV: https://osv.dev/vulnerability/CVE-2022-20633

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-20633/
Summaries are generated and may contain mistakes; the official description above is the record.