# CVE-2025-64515: Open Forms prefill data in read-only components can be tampered

> Attackers can tamper with prefill data in read-only form fields, allowing unauthorized modification of data that should be immutable.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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:** 18 Nov 2025
- **Updated:** 19 Nov 2025
- **Also known as:** GHSA-cp63-63mq-5wvf

## What is CVE-2025-64515?

CVE-2025-64515 is a medium-severity vulnerability in open-formulieren open-forms, published on 18 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Open Forms allows users create and publish smart forms. Prior to versions 3.2.7 and 3.3.3, forms where the prefill data fields are dynamically set to readonly/disabled can be modified by malicious users deliberately trying to modify data they're not supposed to. For regular users, the form fields are marked as readonly and cannot be modified through the user interface. This issue has been patched in versions 3.2.7 and 3.3.3.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2025-64515?

It affects 1 product.


Products: Maykinmedia Open Forms.

## How do I fix CVE-2025-64515?

No fix has been published for CVE-2025-64515 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-64515 being exploited?

There is no known exploitation of CVE-2025-64515 in the wild and no public exploit code.

## Other vulnerabilities in open-formulieren open-forms

- [CVE-2024-24771](https://insights.sbomify.com/CVE-2024-24771/): Open Forms potential multi-factor authentication bypass (high 7.7)
- [CVE-2022-31041](https://insights.sbomify.com/CVE-2022-31041/): Insufficient content-type validation for uploaded files in open-forms (high 7.6)
- [CVE-2022-31040](https://insights.sbomify.com/CVE-2022-31040/): Open Redirect in open-forms (high 7.1)
- [CVE-2026-28803](https://insights.sbomify.com/CVE-2026-28803/): Open Forms possible to view submission details of other people than intended (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-64515 and fix it if it is affected.

What it is: CVE-2025-64515 is a medium-severity vulnerability in open-formulieren open-forms, published on 18 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-64515 in the wild and no public exploit code.

Affected product: open-formulieren open-forms. 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-2025-64515/ (Markdown: https://insights.sbomify.com/CVE-2025-64515/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-64515
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-64515
- OSV: https://osv.dev/vulnerability/CVE-2025-64515

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-64515/
Summaries are generated and may contain mistakes; the official description above is the record.