# CVE-2020-1771: Possible XSS in Customer user address book

> Attackers can execute malicious JavaScript in agents' browsers via crafted links in the customer address book, potentially leading to account takeover.

- **Severity:** Medium 4.6 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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:** Yes
- **Published:** 27 Mar 2020
- **Updated:** 17 Sep 2024
- **Also known as:** DEBIAN-CVE-2020-1771, GHSA-38fp-9j49-g4gm, UBUNTU-CVE-2020-1771

## What is CVE-2020-1771?

CVE-2020-1771 is a medium-severity cross-site scripting vulnerability in Otrs Otrs, published on 27 Mar 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Attacker is able craft an article with a link to the customer address book with malicious content (JavaScript). When agent opens the link, JavaScript code is executed due to the missing parameter encoding. This issue affects: ((OTRS)) Community Edition: 6.0.26 and prior versions. OTRS: 7.0.15 and prior versions.

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

## Which versions are affected by CVE-2020-1771?

It affects 1 product.


Products: Otrs Otrs.

## How do I fix CVE-2020-1771?

Upgrade to a fixed version.

## Is CVE-2020-1771 being exploited?

There is no known exploitation of CVE-2020-1771 in the wild and no public exploit code.

## Other vulnerabilities in Otrs Otrs

- [CVE-2026-48188](https://insights.sbomify.com/CVE-2026-48188/): SQL Injection via MySQL Quote Method (critical 9.1)
- [CVE-2013-4717](https://insights.sbomify.com/CVE-2013-4717/): SQL injection in n/a (high 8.8)
- [CVE-2017-14635](https://insights.sbomify.com/CVE-2017-14635/): Code injection in n/a (high 8.8)
- [CVE-2023-5422](https://insights.sbomify.com/CVE-2023-5422/): SSL Certificates are not checked for E-Mail Handling (high 8.7)
- [CVE-2023-6254](https://insights.sbomify.com/CVE-2023-6254/): Password is send back to client (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-1771 and fix it if it is affected.

What it is: CVE-2020-1771 is a medium-severity cross-site scripting vulnerability in Otrs Otrs, published on 27 Mar 2020. 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-2020-1771 in the wild and no public exploit code.

Affected product: Otrs Otrs. 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-2020-1771/ (Markdown: https://insights.sbomify.com/CVE-2020-1771/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-1771
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-1771
- OSV: https://osv.dev/vulnerability/CVE-2020-1771

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-1771/
Summaries are generated and may contain mistakes; the official description above is the record.