# CVE-2020-12432: Cross-site scripting in n/a

> Cross-site scripting in Collabora CODE WOPI API allows attackers to steal credentials via cookies or local storage after obtaining an access token.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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:** 21 Jul 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-w9v6-fcfc-9xr5

## What is CVE-2020-12432?

CVE-2020-12432 is a medium-severity cross-site scripting vulnerability in n/a, published on 21 Jul 2020. 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

The WOPI API integration for Vereign Collabora CODE through 4.2.2 does not properly restrict delivery of JavaScript to a victim's browser, and lacks proper MIME type access control, which could lead to XSS that steals account credentials via cookies or local storage. The attacker must first obtain an API access token, which can be accomplished if the attacker is able to upload a .docx or .odt file. The associated API endpoints for exploitation are /wopi/files and /wopi/getAccessToken.

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

## Which versions are affected by CVE-2020-12432?

It affects 1 product.


Products: Collaboraoffice Collabora Online Development Edition.

## How do I fix CVE-2020-12432?

No fix has been published for CVE-2020-12432 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-12432 being exploited?

There is no known exploitation of CVE-2020-12432 in the wild and no public exploit code.

Public exploit code:

- https://github.com/d7x/CVE-2020-12432 (github_poc): https://github.com/d7x/CVE-2020-12432

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-12432 and fix it if it is affected.

What it is: CVE-2020-12432 is a medium-severity cross-site scripting vulnerability in n/a, published on 21 Jul 2020. 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-2020-12432 in the wild and no public exploit code.

Affected product: n/a. 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-2020-12432/ (Markdown: https://insights.sbomify.com/CVE-2020-12432/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-12432
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-12432
- OSV: https://osv.dev/vulnerability/CVE-2020-12432

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-12432/
Summaries are generated and may contain mistakes; the official description above is the record.