# CVE-2026-25117: pwn.college DOJO vulnerable to sandbox escape leading to arbitrary javascript execution

> Challenge authors can inject arbitrary JavaScript via missing sandboxing, enabling code execution and account takeover on the pwn.college DOJO platform.

- **Severity:** High 8.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA: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:** 29 Jan 2026
- **Updated:** 2 Feb 2026
- **Also known as:** GHSA-wvcf-9xm8-7mrg

## What is CVE-2026-25117?

CVE-2026-25117 is a high-severity cross-site scripting vulnerability in pwncollege dojo, published on 29 Jan 2026. 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

pwn.college DOJO is an education platform for learning cybersecurity. Prior to commit e33da14449a5abcff507e554f66e2141d6683b0a, missing sandboxing on `/workspace/*` routes allows challenge authors to inject arbitrary javascript which runs on the same origin as `http[:]//dojo[.]website`. This is a sandbox escape leading to arbitrary javascript execution as the dojo's origin. A challenge author can craft a page that executes any dangerous actions that the user could. Version e33da14449a5abcff507e554f66e2141d6683b0a patches the issue.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-25117?


## How do I fix CVE-2026-25117?

No fix has been published for CVE-2026-25117 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25117 being exploited?

There is no known exploitation of CVE-2026-25117 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25117 and fix it if it is affected.

What it is: CVE-2026-25117 is a high-severity cross-site scripting vulnerability in pwncollege dojo, published on 29 Jan 2026. 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-2026-25117 in the wild and no public exploit code.

Affected product: pwncollege dojo. 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-2026-25117/ (Markdown: https://insights.sbomify.com/CVE-2026-25117/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25117
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25117
- OSV: https://osv.dev/vulnerability/CVE-2026-25117

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25117/
Summaries are generated and may contain mistakes; the official description above is the record.