# CVE-2021-25921: Cross-site scripting in openemr

> Attackers can inject malicious scripts into the Allergies section, potentially compromising admin accounts and modifying data in OpenEMR.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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:** 22 Mar 2021
- **Updated:** 30 Apr 2025
- **Also known as:** GHSA-vgg5-g88f-mq8p

## What is CVE-2021-25921?

CVE-2021-25921 is a medium-severity cross-site scripting vulnerability in Open-Emr Openemr, published on 22 Mar 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

In OpenEMR, versions 2.7.3-rc1 to 6.0.0 are vulnerable to Stored Cross-Site-Scripting (XSS) due to user input not being validated properly in the `Allergies` section. An attacker could lure an admin to enter a malicious payload and by that initiate the exploit.

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

## Which versions are affected by CVE-2021-25921?

It affects 1 product.


Products: Open-Emr Openemr.

## How do I fix CVE-2021-25921?

No fix has been published for CVE-2021-25921 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25921 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-25921 exists.

## Other vulnerabilities in Open-Emr Openemr

- [CVE-2026-24898](https://insights.sbomify.com/CVE-2026-24898/): OpenEMR has an Unauthenticated MedEx Token Disclosure (critical 10.0)
- [CVE-2026-24849](https://insights.sbomify.com/CVE-2026-24849/): OpenEMR Arbitrary File Read Vulnerability (critical 10.0)
- [CVE-2026-24908](https://insights.sbomify.com/CVE-2026-24908/): OpenEMR has SQL Injection in Patient API Sort Parameter (critical 10.0)
- [CVE-2022-2734](https://insights.sbomify.com/CVE-2022-2734/): Improper Restriction of Rendered UI Layers or Frames in openemr/openemr (critical 10.0)
- [CVE-2024-22611](https://insights.sbomify.com/CVE-2024-22611/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25921 and fix it if it is affected.

What it is: CVE-2021-25921 is a medium-severity cross-site scripting vulnerability in Open-Emr Openemr, published on 22 Mar 2021. Any signed-in user can exploit it over the network, 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-2021-25921 exists.

Affected product: Open-Emr Openemr. 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-2021-25921/ (Markdown: https://insights.sbomify.com/CVE-2021-25921/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25921
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25921
- OSV: https://osv.dev/vulnerability/CVE-2021-25921

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25921/
Summaries are generated and may contain mistakes; the official description above is the record.