# CVE-2023-43340: Evolution CMS Cross-site Scripting vulnerability

> A local attacker can execute arbitrary code via XSS in Evolution CMS by injecting payloads into admin configuration parameters.

- **Severity:** Medium 5.2 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Oct 2023
- **Updated:** 12 Sep 2024
- **Also known as:** GHSA-432f-967f-vxg4

## What is CVE-2023-43340?

CVE-2023-43340 is a medium-severity cross-site scripting vulnerability in n/a, published on 19 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Cross-site scripting (XSS) vulnerability in evolution v.3.2.3 allows a local attacker to execute arbitrary code via a crafted payload injected into the cmsadmin, cmsadminemail, cmspassword and cmspasswordconfim parameters

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

## Which versions are affected by CVE-2023-43340?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `evolutioncms/evolution` | Packagist | All versions to 3.2.3 | None |
| `evolutioncms/evolution` | Packagist | All versions to 3.2.3 | None |

Products: Evo Evolution Cms.

## How do I fix CVE-2023-43340?

No fix has been published for CVE-2023-43340 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-43340 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-43340 exists.

Public exploit code:

- Evolution CMS 3.2.3 is affected by a Cross-Site Scripting (XSS) vulnerability that allows attackers to execute arbitrary code via a crafted payload in the installation/options process. (github_poc): https://github.com/sromanhu/-CVE-2023-43340-Evolution-Reflected-XSS---Installation-Admin-Options

## Other vulnerabilities in n/a

- [CVE-2023-43341](https://insights.sbomify.com/CVE-2023-43341/): Evolution CMS Cross-site Scripting vulnerability (medium 6.1)
- [CVE-2020-23238](https://insights.sbomify.com/CVE-2020-23238/): Cross-site scripting in n/a (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-43340 and fix it if it is affected.

What it is: CVE-2023-43340 is a medium-severity cross-site scripting vulnerability in n/a, published on 19 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-43340 exists.

Affected packages and fixed versions:
- evolutioncms/evolution (Packagist): affected all versions up to 3.2.3; no fix listed
- evolutioncms/evolution (Packagist): affected all versions up to 3.2.3; no fix listed

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-2023-43340/ (Markdown: https://insights.sbomify.com/CVE-2023-43340/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-43340
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-43340
- OSV: https://osv.dev/vulnerability/CVE-2023-43340

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-43340/
Summaries are generated and may contain mistakes; the official description above is the record.