# CVE-2021-24299: ReDi Restaurant Reservations < 21.0426 - Unauthenticated Stored Cross-Site Scripting (XSS)

> Unauthenticated attackers can inject malicious scripts via reservation comments, leading to code execution when viewed by other users.

- **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:** 17 May 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-7v76-9gr6-p8jh

## What is CVE-2021-24299?

CVE-2021-24299 is a medium-severity cross-site scripting vulnerability in ReDi Restaurant Reservation, published on 17 May 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 ReDi Restaurant Reservation WordPress plugin before 21.0426 provides the functionality to let users make restaurant reservations. These reservations are stored and can be listed on an 'Upcoming' page provided by the plugin. An unauthenticated user can fill in the form to make a restaurant reservation. The form to make a restaurant reservation field called 'Comment' does not use proper input validation and can be used to store XSS payloads. The XSS payloads will be executed when the plugin user goes to the 'Upcoming' page, which is an external website https://upcoming.reservationdiary.eu/ loaded in an iframe, and the stored reservation with XSS payload is loaded.

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

## Which versions are affected by CVE-2021-24299?

It affects 1 product.


Products: Catzsoft Redi Restaurant Reservation.

## How do I fix CVE-2021-24299?

No fix has been published for CVE-2021-24299 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24299 being exploited?

There is no known exploitation of CVE-2021-24299 in the wild and no public exploit code.

Public exploit code:

- WordPress Plugin ReDi Restaurant Reservation 21.0307 - 'Comment' Stored Cross-Site Scripting (XSS) (exploitdb)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24299 and fix it if it is affected.

What it is: CVE-2021-24299 is a medium-severity cross-site scripting vulnerability in ReDi Restaurant Reservation, published on 17 May 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: There is no known exploitation of CVE-2021-24299 in the wild and no public exploit code.

Affected product: ReDi Restaurant Reservation. 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-2021-24299/ (Markdown: https://insights.sbomify.com/CVE-2021-24299/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24299
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24299
- OSV: https://osv.dev/vulnerability/CVE-2021-24299

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-24299/
Summaries are generated and may contain mistakes; the official description above is the record.