# CVE-2020-4061: Cross-site Scripting in OctoberPotential self-XSS when pasting content from malicious websites

> Attackers can execute arbitrary scripts in the victim's browser by tricking them into pasting malicious content into the rich editor.

- **Severity:** Low 3.7 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 2 Jul 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-3pc2-fm7p-q2vg

## What is CVE-2020-4061?

CVE-2020-4061 is a low-severity cross-site scripting vulnerability in Octobercms October, published on 2 Jul 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

In October from version 1.0.319 and before version 1.0.467, pasting content copied from malicious websites into the Froala richeditor could result in a successful self-XSS attack. This has been fixed in 1.0.467.

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

## Which versions are affected by CVE-2020-4061?

2 open source packages ship an affected version, including october/backend. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `october/backend` | Packagist | From 1.0.319 | 1.0.467 |
| `october/backend` | Packagist | From 1.0.319 | 1.0.467 |

Products: Octobercms October.

## How do I fix CVE-2020-4061?

Upgrade october/backend to 1.0.467 or later.

## Is CVE-2020-4061 being exploited?

There is no known exploitation of CVE-2020-4061 in the wild and no public exploit code.

## Other vulnerabilities in Octobercms October

- [CVE-2021-32648](https://insights.sbomify.com/CVE-2021-32648/): October CMS Improper Authentication (high 8.2, exploited in the wild)
- [CVE-2021-3311](https://insights.sbomify.com/CVE-2021-3311/): October CMS Session ID not invalidated after logout (critical 9.8)
- [CVE-2017-1000194](https://insights.sbomify.com/CVE-2017-1000194/): October CMS File Upload Vulnerability (critical 9.8)
- [CVE-2017-1000196](https://insights.sbomify.com/CVE-2017-1000196/): Code injection in n/a (critical 9.8)
- [CVE-2017-1000197](https://insights.sbomify.com/CVE-2017-1000197/): Path traversal in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-4061 and fix it if it is affected.

What it is: CVE-2020-4061 is a low-severity cross-site scripting vulnerability in Octobercms October, published on 2 Jul 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-4061 in the wild and no public exploit code.

Affected packages and fixed versions:
- october/backend (Packagist): affected from 1.0.319; fixed in 1.0.467
- october/backend (Packagist): affected from 1.0.319; fixed in 1.0.467

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-2020-4061/ (Markdown: https://insights.sbomify.com/CVE-2020-4061/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-4061
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-4061
- OSV: https://osv.dev/vulnerability/CVE-2020-4061

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-4061/
Summaries are generated and may contain mistakes; the official description above is the record.