# CVE-2021-24510: MF Gig Calendar < 1.2 - Reflected Cross-Site Scripting (XSS)

> Attackers can inject malicious scripts into the admin dashboard via the id parameter, potentially compromising administrator accounts.

- **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:** 13 Sep 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-54p3-vvrm-gcf3

## What is CVE-2021-24510?

CVE-2021-24510 is a medium-severity cross-site scripting vulnerability in Unknown MF Gig Calendar, published on 13 Sep 2021. 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 MF Gig Calendar WordPress plugin before 1.2 does not sanitise and escape the id GET parameter before outputting back in the admin dashboard when editing an Event, leading to a reflected Cross-Site Scripting issue

## Which versions are affected by CVE-2021-24510?

It affects 1 product.


Products: Mf Gig Calendar Project Mf Gig Calendar.

## How do I fix CVE-2021-24510?

No fix has been published for CVE-2021-24510 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24510 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24510 exists.

Public exploit code:

- WordPress MF Gig Calendar <=1.1 - Cross-Site Scripting (nuclei): http/cves/2021/CVE-2021-24510.yaml

## Other vulnerabilities in Unknown MF Gig Calendar

- [CVE-2023-50842](https://insights.sbomify.com/CVE-2023-50842/): WordPress MF Gig Calendar Plugin <= 1.2.1 is vulnerable to SQL Injection (high 8.5)
- [CVE-2024-3756](https://insights.sbomify.com/CVE-2024-3756/): MF Gig Calendar <= 1.2.1 - Arbitrary Event Deletion via CSRF (high 7.5)
- [CVE-2023-37970](https://insights.sbomify.com/CVE-2023-37970/): WordPress MF Gig Calendar Plugin <= 1.2 is vulnerable to Cross Site Scripting (XSS) (medium 6.5)
- [CVE-2024-3755](https://insights.sbomify.com/CVE-2024-3755/): MF Gig Calendar <= 1.2.1 - Editor+ Stored XSS (medium 5.4)
- [CVE-2024-33651](https://insights.sbomify.com/CVE-2024-33651/): WordPress MF Gig Calendar plugin <= 1.2.1 - Cross Site Request Forgery (CSRF) vulnerability (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24510 and fix it if it is affected.

What it is: CVE-2021-24510 is a medium-severity cross-site scripting vulnerability in Unknown MF Gig Calendar, published on 13 Sep 2021. An attacker can exploit it over the internet without logging in, 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-2021-24510 exists.

Affected product: Unknown MF Gig Calendar. 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-2021-24510/ (Markdown: https://insights.sbomify.com/CVE-2021-24510/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24510
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24510
- OSV: https://osv.dev/vulnerability/CVE-2021-24510

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-24510/
Summaries are generated and may contain mistakes; the official description above is the record.