# CVE-2019-1777: Cisco Registered Envelope Service Stored Cross-Site Scripting Vulnerability

> An authenticated attacker can inject malicious scripts via email payloads to execute code or steal data in other users' browsers.

- **Severity:** Medium 5.4 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **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:** 18 Apr 2019
- **Updated:** 21 Nov 2024
- **Also known as:** GHSA-m27g-q8gc-rwfg

## What is CVE-2019-1777?

CVE-2019-1777 is a medium-severity cross-site scripting vulnerability in Cisco Registered Envelope Service, published on 18 Apr 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A vulnerability in the web-based interface of the Cisco Registered Envelope Service could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against another user of the service. The vulnerability is due to insufficient validation of user-supplied input by the web-based interface of the affected software. An attacker could exploit this vulnerability by sending an email with a malicious payload to another user. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. This vulnerability affects software versions 5.3.4.x.

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

## Which versions are affected by CVE-2019-1777?

It affects 1 product.


Products: Cisco Registered Envelope Service.

## How do I fix CVE-2019-1777?

No fix has been published for CVE-2019-1777 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1777 being exploited?

There is no known exploitation of CVE-2019-1777 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Registered Envelope Service

- [CVE-2017-12320](https://insights.sbomify.com/CVE-2017-12320/): Cross-site scripting in Cisco Registered Envelope Service (medium 6.1)
- [CVE-2017-12321](https://insights.sbomify.com/CVE-2017-12321/): Cross-site scripting in Cisco Registered Envelope Service (medium 6.1)
- [CVE-2017-12323](https://insights.sbomify.com/CVE-2017-12323/): Cross-site scripting in Cisco Registered Envelope Service (medium 6.1)
- [CVE-2017-3889](https://insights.sbomify.com/CVE-2017-3889/): Open redirect in Cisco Registered Envelope Service (medium 6.1)
- [CVE-2018-0367](https://insights.sbomify.com/CVE-2018-0367/): Cross-site scripting in Registered Envelope Service (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1777 and fix it if it is affected.

What it is: CVE-2019-1777 is a medium-severity cross-site scripting vulnerability in Cisco Registered Envelope Service, published on 18 Apr 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-1777 in the wild and no public exploit code.

Affected product: Cisco Registered Envelope Service. 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-2019-1777/ (Markdown: https://insights.sbomify.com/CVE-2019-1777/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1777
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1777
- OSV: https://osv.dev/vulnerability/CVE-2019-1777

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-1777/
Summaries are generated and may contain mistakes; the official description above is the record.