# CVE-2023-2316: Typora Local File Disclosure

> A crafted webpage or markdown file can exploit improper path handling in Typora to access and exfiltrate local files to remote servers.

- **Severity:** High 7.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/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:** 19 Aug 2023
- **Updated:** 7 Oct 2024
- **Also known as:** GHSA-9f2q-mg3j-68hc

## What is CVE-2023-2316?

CVE-2023-2316 is a high-severity path traversal vulnerability in Typora, published on 19 Aug 2023. 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

Improper path handling in Typora before 1.6.7 on Windows and Linux allows a crafted webpage to access local files and exfiltrate them to remote web servers via "typora://app/<absolute-path>". 

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-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2023-2316?

It affects 1 product.


Products: Typora Typora.

## How do I fix CVE-2023-2316?

No fix has been published for CVE-2023-2316 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-2316 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-2316 exists.

## Other vulnerabilities in Typora

- [CVE-2023-2317](https://insights.sbomify.com/CVE-2023-2317/): Typora DOM-Based Cross-site Scripting leading to Remote Code Execution (high 8.6)
- [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)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-2316 and fix it if it is affected.

What it is: CVE-2023-2316 is a high-severity path traversal vulnerability in Typora, published on 19 Aug 2023. An attacker can exploit it over the internet without logging in, 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-2023-2316 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-2023-2316/ (Markdown: https://insights.sbomify.com/CVE-2023-2316/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-2316
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-2316
- OSV: https://osv.dev/vulnerability/CVE-2023-2316

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-2316/
Summaries are generated and may contain mistakes; the official description above is the record.