# CVE-2021-24878: SupportCandy < 2.2.7 - Reflected Cross-Site Scripting

> Attackers can inject malicious scripts via the query string in SupportCandy plugin pages, potentially compromising user sessions.

- **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:** 7 Feb 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-w9r7-4qpm-xxc5

## What is CVE-2021-24878?

CVE-2021-24878 is a medium-severity cross-site scripting vulnerability in Unknown SupportCandy – Helpdesk & Support Ticket System, published on 7 Feb 2022. 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 SupportCandy WordPress plugin before 2.2.7 does not sanitise and escape the query string before outputting it back in pages with the [wpsc_create_ticket] shortcode embed, leading to a Reflected Cross-Site Scripting issue

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

## Which versions are affected by CVE-2021-24878?

It affects 1 product.


Products: Supportcandy Supportcandy.

## How do I fix CVE-2021-24878?

No fix has been published for CVE-2021-24878 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24878 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24878 exists.

Public exploit code:

- SupportCandy < 2.2.7 - Reflected Cross-Site Scripting (nuclei): http/cves/2021/CVE-2021-24878.yaml

## Other vulnerabilities in Unknown SupportCandy – Helpdesk & Support Ticket System

- [CVE-2023-1730](https://insights.sbomify.com/CVE-2023-1730/): SupportCandy < 3.1.5 - Unauthenticated SQLi (critical 9.8)
- [CVE-2019-11223](https://insights.sbomify.com/CVE-2019-11223/): File upload in n/a (critical 9.8)
- [CVE-2023-2719](https://insights.sbomify.com/CVE-2023-2719/): SupportCandy < 3.1.7 - Subscriber+ SQLi (high 8.8)
- [CVE-2021-24879](https://insights.sbomify.com/CVE-2021-24879/): SupportCandy < 2.2.7 - CSRF to Cross-Site Scripting (high 8.8)
- [CVE-2021-24839](https://insights.sbomify.com/CVE-2021-24839/): SupportCandy < 2.2.5 - Unauthenticated Arbitrary Ticket Deletion (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24878 and fix it if it is affected.

What it is: CVE-2021-24878 is a medium-severity cross-site scripting vulnerability in Unknown SupportCandy – Helpdesk & Support Ticket System, published on 7 Feb 2022. 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-2021-24878 exists.

Affected product: Unknown SupportCandy – Helpdesk & Support Ticket System. 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-2021-24878/ (Markdown: https://insights.sbomify.com/CVE-2021-24878/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24878
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24878
- OSV: https://osv.dev/vulnerability/CVE-2021-24878

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-24878/
Summaries are generated and may contain mistakes; the official description above is the record.