# CVE-2020-7011: Cross-site scripting in Elastic App Search

> Attackers can execute arbitrary JavaScript in victims' browsers via malicious URLs in the Reference UI of Elastic App Search.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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:** 3 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** UBUNTU-CVE-2020-7011

## What is CVE-2020-7011?

CVE-2020-7011 is a medium-severity cross-site scripting vulnerability in Elastic App Search, published on 3 Jun 2020. 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

Elastic App Search versions before 7.7.0 contain a cross site scripting (XSS) flaw when displaying document URLs in the Reference UI. If the Reference UI injects a URL into a result, that URL will be rendered by the web browser. If an attacker is able to control the contents of such a field, they could execute arbitrary JavaScript in the victim�s web browser.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-84 (Improper Neutralization of Encoded URI Schemes in a Web Page)

## Which versions are affected by CVE-2020-7011?

It affects 1 product.


Products: Elastic Elastic App Search.

## How do I fix CVE-2020-7011?

No fix has been published for CVE-2020-7011 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7011 being exploited?

There is no known exploitation of CVE-2020-7011 in the wild and no public exploit code.

## Other vulnerabilities in Elastic App Search

- [CVE-2021-22140](https://insights.sbomify.com/CVE-2021-22140/): XML external entity in Elastic App Search (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7011 and fix it if it is affected.

What it is: CVE-2020-7011 is a medium-severity cross-site scripting vulnerability in Elastic App Search, published on 3 Jun 2020. 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-2020-7011 in the wild and no public exploit code.

Affected product: Elastic App Search. 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-2020-7011/ (Markdown: https://insights.sbomify.com/CVE-2020-7011/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7011
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7011
- OSV: https://osv.dev/vulnerability/CVE-2020-7011

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-7011/
Summaries are generated and may contain mistakes; the official description above is the record.