# CVE-2021-45822: Cross-site scripting in n/a

> Stored XSS in Xbtit allows attackers to execute malicious JavaScript via the chat data endpoint, 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:** 16 Mar 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-x247-hw6m-c9w4

## What is CVE-2021-45822?

CVE-2021-45822 is a medium-severity cross-site scripting vulnerability in n/a, published on 16 Mar 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

A cross-site scripting vulnerability is present in Xbtit 3.1. The stored XSS vulnerability occurs because /ajaxchat/sendChatData.php does not properly validate the value of the "n" (POST) parameter. Through this vulnerability, an attacker is capable to execute malicious JavaScript code.

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

## Which versions are affected by CVE-2021-45822?

It affects 1 product.


Products: Btiteam Xbtit.

## How do I fix CVE-2021-45822?

No fix has been published for CVE-2021-45822 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45822 being exploited?

There is no known exploitation of CVE-2021-45822 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-15680](https://insights.sbomify.com/CVE-2018-15680/): Weak cryptography in n/a (critical 9.8)
- [CVE-2018-15681](https://insights.sbomify.com/CVE-2018-15681/): Weak cryptography in n/a (critical 9.8)
- [CVE-2021-45821](https://insights.sbomify.com/CVE-2021-45821/): SQL injection in n/a (high 8.8)
- [CVE-2018-15682](https://insights.sbomify.com/CVE-2018-15682/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2018-17870](https://insights.sbomify.com/CVE-2018-17870/): Open redirect in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45822 and fix it if it is affected.

What it is: CVE-2021-45822 is a medium-severity cross-site scripting vulnerability in n/a, published on 16 Mar 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: There is no known exploitation of CVE-2021-45822 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-2021-45822/ (Markdown: https://insights.sbomify.com/CVE-2021-45822/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45822
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45822
- OSV: https://osv.dev/vulnerability/CVE-2021-45822

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45822/
Summaries are generated and may contain mistakes; the official description above is the record.