# CVE-2020-3129: Cisco Unity Connection Stored Cross-Site Scripting Vulnerability

> Authenticated attackers can inject malicious scripts into the web interface, executing them on other users' browsers to potentially hijack sessions.

- **Severity:** Medium 4.8 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 26 Jan 2020
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-9478-pvwh-fmh7

## What is CVE-2020-3129?

CVE-2020-3129 is a medium-severity cross-site scripting vulnerability in Cisco Unity Connection, published on 26 Jan 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

A vulnerability in the web-based management interface of Cisco Unity Connection Software could allow an authenticated, remote attacker to perform a stored cross-site scripting (XSS) attack. The vulnerability is due to insufficient input validation by the web-based management interface. An attacker could exploit this vulnerability by providing crafted data to a specific field within the interface. A successful exploit could allow the attacker to store an XSS attack within the interface. This stored XSS attack would then be executed on the system of any user viewing the attacker-supplied data element.

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

## Which versions are affected by CVE-2020-3129?

It affects 1 product.


Products: Cisco Unity Connection.

## How do I fix CVE-2020-3129?

No fix has been published for CVE-2020-3129 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3129 being exploited?

There is no known exploitation of CVE-2020-3129 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Unity Connection

- [CVE-2014-3333](https://insights.sbomify.com/CVE-2014-3333/): Privilege escalation in n/a (critical 9.0)
- [CVE-2012-0366](https://insights.sbomify.com/CVE-2012-0366/): Privilege escalation in n/a (critical 9.0)
- [CVE-2026-20034](https://insights.sbomify.com/CVE-2026-20034/): Cisco Unity Connection Remote Code Execution Vulnerability (high 8.8)
- [CVE-2012-3060](https://insights.sbomify.com/CVE-2012-3060/): Denial of service in n/a (high 7.8)
- [CVE-2012-0367](https://insights.sbomify.com/CVE-2012-0367/): Denial of service in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3129 and fix it if it is affected.

What it is: CVE-2020-3129 is a medium-severity cross-site scripting vulnerability in Cisco Unity Connection, published on 26 Jan 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-3129 in the wild and no public exploit code.

Affected product: Cisco Unity Connection. 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-2020-3129/ (Markdown: https://insights.sbomify.com/CVE-2020-3129/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3129
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3129
- OSV: https://osv.dev/vulnerability/CVE-2020-3129

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-3129/
Summaries are generated and may contain mistakes; the official description above is the record.