# CVE-2020-36635: OpenMRS Appointment Scheduling Module AppointmentTypeValidator.java validateFieldName cross site scripting

> Remote attackers can inject malicious scripts via the appointment type validator, potentially compromising user sessions in OpenMRS.

- **Severity:** Low 3.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 27 Dec 2022
- **Updated:** 11 Apr 2025
- **Also known as:** GHSA-9pf9-659m-558x

## What is CVE-2020-36635?

CVE-2020-36635 is a low-severity cross-site scripting vulnerability in OpenMRS Appointment Scheduling Module, published on 27 Dec 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A vulnerability was found in OpenMRS Appointment Scheduling Module up to 1.12.x. It has been classified as problematic. This affects the function validateFieldName of the file api/src/main/java/org/openmrs/module/appointmentscheduling/validator/AppointmentTypeValidator.java. The manipulation leads to cross site scripting. It is possible to initiate the attack remotely. Upgrading to version 1.13.0 is able to address this issue. The name of the patch is 34213c3f6ea22df427573076fb62744694f601d8. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-216915.

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

## Which versions are affected by CVE-2020-36635?

It affects 1 product.


Products: Openmrs Appointment Scheduling Module.

## How do I fix CVE-2020-36635?

No fix has been published for CVE-2020-36635 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36635 being exploited?

There is no known exploitation of CVE-2020-36635 in the wild and no public exploit code.

## Other vulnerabilities in OpenMRS Appointment Scheduling Module

- [CVE-2022-4727](https://insights.sbomify.com/CVE-2022-4727/): OpenMRS Appointment Scheduling Module Notes AppointmentRequest.java getNotes cross site scripting (low 3.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36635 and fix it if it is affected.

What it is: CVE-2020-36635 is a low-severity cross-site scripting vulnerability in OpenMRS Appointment Scheduling Module, published on 27 Dec 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-36635 in the wild and no public exploit code.

Affected product: OpenMRS Appointment Scheduling Module. 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-2020-36635/ (Markdown: https://insights.sbomify.com/CVE-2020-36635/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36635
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36635
- OSV: https://osv.dev/vulnerability/CVE-2020-36635

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-36635/
Summaries are generated and may contain mistakes; the official description above is the record.