# CVE-2025-58361: Promptcraft Forge Studio's incomplete URL check is vulnerable to XSS via SVG

> Attackers can execute arbitrary scripts via crafted data URLs due to incomplete URL validation in Promptcraft Forge Studio.

- **Severity:** Critical 9.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/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:** 4 Sep 2025
- **Updated:** 4 Sep 2025

## What is CVE-2025-58361?

CVE-2025-58361 is a critical cross-site scripting vulnerability in MarceloTessaro promptcraft-forge-studio, published on 4 Sep 2025. 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

Promptcraft Forge Studio is a toolkit for evaluating, optimizing, and maintaining  LLM-powered applications. All versions contain an non-exhaustive URL scheme check that does not protect against XSS. User-controlled URLs pass through src/utils/validation.ts, but the check only strips `javascript:` and a few patterns. `data:` URLs (for example data:image/svg+xml,…) still pass. If a sanitized value is used in href/src, an attacker can execute a script. There is currently no fix for this issue.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-20 (Improper Input Validation), CWE-184 (Incomplete List of Disallowed Inputs)

## Which versions are affected by CVE-2025-58361?


## How do I fix CVE-2025-58361?

No fix has been published for CVE-2025-58361 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-58361 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-58361 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-58361 and fix it if it is affected.

What it is: CVE-2025-58361 is a critical cross-site scripting vulnerability in MarceloTessaro promptcraft-forge-studio, published on 4 Sep 2025. 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-2025-58361 exists.

Affected product: MarceloTessaro promptcraft-forge-studio. 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-2025-58361/ (Markdown: https://insights.sbomify.com/CVE-2025-58361/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-58361
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-58361
- OSV: https://osv.dev/vulnerability/CVE-2025-58361

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-58361/
Summaries are generated and may contain mistakes; the official description above is the record.