# CVE-2021-30111: Cross-site scripting in n/a

> Attackers can inject malicious JavaScript into event fields, which executes for other users viewing the events.

- **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:** 8 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-7wqr-7hpc-ghmh

## What is CVE-2021-30111?

CVE-2021-30111 is a medium-severity cross-site scripting vulnerability in n/a, published on 8 Apr 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

A stored XSS vulnerability exists in Web-School ERP V 5.0 via (Add Events) in the event name and description fields. An attack can inject a JavaScript code that will be stored in the page. If any visitor sees the events, then the payload will be executed.

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

## Which versions are affected by CVE-2021-30111?

It affects 1 product.


Products: Web-School Enterprise Resource Planning.

## How do I fix CVE-2021-30111?

No fix has been published for CVE-2021-30111 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-30111 being exploited?

There is no known exploitation of CVE-2021-30111 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-30112](https://insights.sbomify.com/CVE-2021-30112/): Cross-site request forgery in n/a (medium 6.5)
- [CVE-2021-30114](https://insights.sbomify.com/CVE-2021-30114/): Cross-site request forgery in n/a (medium 6.5)
- [CVE-2021-30113](https://insights.sbomify.com/CVE-2021-30113/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-30111 and fix it if it is affected.

What it is: CVE-2021-30111 is a medium-severity cross-site scripting vulnerability in n/a, published on 8 Apr 2021. 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-2021-30111 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-2021-30111/ (Markdown: https://insights.sbomify.com/CVE-2021-30111/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-30111
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-30111
- OSV: https://osv.dev/vulnerability/CVE-2021-30111

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-30111/
Summaries are generated and may contain mistakes; the official description above is the record.