# CVE-2023-2317: Typora DOM-Based Cross-site Scripting leading to Remote Code Execution

> A DOM-based XSS in Typora allows attackers to execute arbitrary code via malicious markdown files or pasted content.

- **Severity:** High 8.6 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 19 Aug 2023
- **Updated:** 7 Oct 2024
- **Also known as:** GHSA-vwv2-9jpv-577p

## What is CVE-2023-2317?

CVE-2023-2317 is a high-severity cross-site scripting vulnerability in Typora, published on 19 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

DOM-based XSS in updater/update.html in Typora before 1.6.7 on Windows and Linux allows a crafted markdown file to run arbitrary JavaScript code in the context of Typora main window via loading typora://app/typemark/updater/update.html in <embed> tag. This vulnerability can be exploited if a user opens a malicious markdown file in Typora, or copies text from a malicious webpage and paste it into Typora.

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

## Which versions are affected by CVE-2023-2317?

It affects 1 product.


Products: Typora Typora.

## How do I fix CVE-2023-2317?

No fix has been published for CVE-2023-2317 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-2317 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-2317 exists.

## Other vulnerabilities in Typora

- [CVE-2019-20374](https://insights.sbomify.com/CVE-2019-20374/): Cross-site scripting in n/a (high 8.3)
- [CVE-2019-12172](https://insights.sbomify.com/CVE-2019-12172/): Path traversal in n/a (high 7.8)
- [CVE-2019-12137](https://insights.sbomify.com/CVE-2019-12137/): Path traversal in n/a (high 7.8)
- [CVE-2020-18336](https://insights.sbomify.com/CVE-2020-18336/): Cross-site scripting in n/a (high 7.4)
- [CVE-2023-2316](https://insights.sbomify.com/CVE-2023-2316/): Typora Local File Disclosure (high 7.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-2317 and fix it if it is affected.

What it is: CVE-2023-2317 is a high-severity cross-site scripting vulnerability in Typora, published on 19 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-2317 exists.

Affected product: Typora. 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-2023-2317/ (Markdown: https://insights.sbomify.com/CVE-2023-2317/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-2317
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-2317
- OSV: https://osv.dev/vulnerability/CVE-2023-2317

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-2317/
Summaries are generated and may contain mistakes; the official description above is the record.