# CVE-2019-1877: Cisco Enterprise Chat and Email Attachment Download Vulnerability

> Unauthenticated attackers can download chat attachments due to insufficient API authentication, exposing sensitive user data.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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:** 5 Nov 2019
- **Updated:** 21 Nov 2024
- **Also known as:** GHSA-mcq8-w4cg-w5v4

## What is CVE-2019-1877?

CVE-2019-1877 is a medium-severity missing authorization vulnerability in Cisco Enterprise Chat and Email, published on 5 Nov 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

A vulnerability in the HTTP API of Cisco Enterprise Chat and Email could allow an unauthenticated, remote attacker to download files attached through chat sessions. The vulnerability is due to insufficient authentication mechanisms on the file download function of the API. An attacker could exploit this vulnerability by sending a crafted request to the API. A successful exploit could allow the attacker to download files that other users attach through the chat feature. This vulnerability affects versions prior to 12.0(1)ES1.

Weakness: CWE-287 (Improper Authentication), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2019-1877?

It affects 1 product.


Products: Cisco Enterprise Chat and Email.

## How do I fix CVE-2019-1877?

No fix has been published for CVE-2019-1877 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1877 being exploited?

There is no known exploitation of CVE-2019-1877 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-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)
- [CVE-2022-20632](https://insights.sbomify.com/CVE-2022-20632/): Cisco Enterprise Chat and Email Cross-Site Scripting Vulnerability (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1877 and fix it if it is affected.

What it is: CVE-2019-1877 is a medium-severity missing authorization vulnerability in Cisco Enterprise Chat and Email, published on 5 Nov 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-2019-1877 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-2019-1877/ (Markdown: https://insights.sbomify.com/CVE-2019-1877/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1877
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1877
- OSV: https://osv.dev/vulnerability/CVE-2019-1877

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1877/
Summaries are generated and may contain mistakes; the official description above is the record.