# CVE-2025-46654: Cross-site scripting in CodiMD

> Attackers can bypass Content Security Policy protections in CodiMD by uploading HTML files referencing JavaScript, enabling cross-site scripting attacks.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/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:** Not needed
- **Fix available:** No
- **Published:** 26 Apr 2025
- **Updated:** 29 Apr 2025
- **Also known as:** GHSA-4r7r-xfq3-2r3v

## What is CVE-2025-46654?

CVE-2025-46654 is a medium-severity cross-site scripting vulnerability in HackMD CodiMD, published on 26 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

CodiMD through 2.2.0 has a CSP-based protection mechanism against XSS through uploaded JavaScript content, but it can be bypassed by uploading a .html file that references an uploaded .js file.

Weakness: CWE-424 (Improper Protection of Alternate Path)

## Which versions are affected by CVE-2025-46654?

It affects 1 product.


Products: Hackmd Codimd.

## How do I fix CVE-2025-46654?

No fix has been published for CVE-2025-46654 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-46654 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-46654 exists.

## Other vulnerabilities in HackMD CodiMD

- [CVE-2024-38354](https://insights.sbomify.com/CVE-2024-38354/): Cross-site Scripting in Hackmd.io Notes lead by HTML Injection (high 8.1)
- [CVE-2024-22778](https://insights.sbomify.com/CVE-2024-22778/): Denial of service in n/a (high 7.5)
- [CVE-2019-15499](https://insights.sbomify.com/CVE-2019-15499/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2024-38353](https://insights.sbomify.com/CVE-2024-38353/): CodiMD - Missing Image Access Controls and Unauthorized Image Access (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-46654 and fix it if it is affected.

What it is: CVE-2025-46654 is a medium-severity cross-site scripting vulnerability in HackMD CodiMD, published on 26 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-46654 exists.

Affected product: HackMD CodiMD. 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-2025-46654/ (Markdown: https://insights.sbomify.com/CVE-2025-46654/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-46654
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-46654
- OSV: https://osv.dev/vulnerability/CVE-2025-46654

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-46654/
Summaries are generated and may contain mistakes; the official description above is the record.