# CVE-2019-9737: Cross-Site Scripting in editor.md

> An attacker can execute arbitrary scripts in the victim's browser via DOM-based XSS in the Editor.md markdown editor library.

- **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:** 13 Mar 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-2j5v-fc74-j9q2

## What is CVE-2019-9737?

CVE-2019-9737 is a medium-severity cross-site scripting vulnerability in n/a, published on 13 Mar 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

Editor.md 1.5.0 has DOM-based XSS via vectors involving the '<EMBED SRC="data:image/svg+xml' substring.

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

## Which versions are affected by CVE-2019-9737?

2 open source packages ship an affected version, including editor.md. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `editor.md` | npm | All versions | None |
| `editor.md` | npm | All versions | None |

Products: Ipandao Editor.md.

## How do I fix CVE-2019-9737?

No fix has been published for CVE-2019-9737 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-9737 being exploited?

There is no known exploitation of CVE-2019-9737 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-19660](https://insights.sbomify.com/CVE-2020-19660/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2023-29641](https://insights.sbomify.com/CVE-2023-29641/): editor.md vulnerable to Cross-site Scripting (medium 6.1)
- [CVE-2020-19697](https://insights.sbomify.com/CVE-2020-19697/): Pandao Editor.md vulnerable to cross-site scripting (XSS) in iframe src parameter (medium 6.1)
- [CVE-2020-19698](https://insights.sbomify.com/CVE-2020-19698/): Pandao Editor.md vulnerable to cross-site scripting (XSS) in editor parameter (medium 6.1)
- [CVE-2019-14653](https://insights.sbomify.com/CVE-2019-14653/): Cross-site Scripting in pandao (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-9737 and fix it if it is affected.

What it is: CVE-2019-9737 is a medium-severity cross-site scripting vulnerability in n/a, published on 13 Mar 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-2019-9737 in the wild and no public exploit code.

Affected packages and fixed versions:
- editor.md (npm): affected all versions; no fix listed
- editor.md (npm): affected all versions; no fix listed

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-2019-9737/ (Markdown: https://insights.sbomify.com/CVE-2019-9737/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-9737
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-9737
- OSV: https://osv.dev/vulnerability/CVE-2019-9737

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-9737/
Summaries are generated and may contain mistakes; the official description above is the record.