# CVE-2020-13483: Cross-site scripting in n/a

> Cross-site scripting in Bitrix24 Web Application Firewall allows attackers to inject malicious scripts via the mobile app list AJAX endpoint.

- **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:** 24 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-wjr8-v45h-rfpv

## What is CVE-2020-13483?

CVE-2020-13483 is a medium-severity cross-site scripting vulnerability in n/a, published on 24 Jun 2020. 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 Web Application Firewall in Bitrix24 through 20.0.0 allows XSS via the items[ITEMS][ID] parameter to the components/bitrix/mobileapp.list/ajax.php/ URI.

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

## Which versions are affected by CVE-2020-13483?

It affects 1 product.


Products: Bitrix24 Bitrix24.

## How do I fix CVE-2020-13483?

No fix has been published for CVE-2020-13483 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-13483 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-13483 exists.

Public exploit code:

- Bitrix24 <=20.0.0 - Cross-Site Scripting (nuclei): http/cves/2020/CVE-2020-13483.yaml

## Other vulnerabilities in n/a

- [CVE-2022-27228](https://insights.sbomify.com/CVE-2022-27228/): Code injection in n/a (critical 9.8)
- [CVE-2020-13484](https://insights.sbomify.com/CVE-2020-13484/): Server-side request forgery in n/a (critical 9.8)
- [CVE-2023-1717](https://insights.sbomify.com/CVE-2023-1717/): Bitrix24 Cross-Site Scripting (XSS) via Client-side Prototype Pollution (critical 9.6)
- [CVE-2023-1720](https://insights.sbomify.com/CVE-2023-1720/): Bitrix24 Stored Cross-Site Scripting (XSS) via File Upload (critical 9.6)
- [CVE-2023-1715](https://insights.sbomify.com/CVE-2023-1715/): Bitrix24 Stored Cross-Site Scripting (XSS) via Improper Input Neutralization on Invoice Edit Page (1 of 2) (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-13483 and fix it if it is affected.

What it is: CVE-2020-13483 is a medium-severity cross-site scripting vulnerability in n/a, published on 24 Jun 2020. 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-2020-13483 exists.

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-2020-13483/ (Markdown: https://insights.sbomify.com/CVE-2020-13483/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13483
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13483
- OSV: https://osv.dev/vulnerability/CVE-2020-13483

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-13483/
Summaries are generated and may contain mistakes; the official description above is the record.