# CVE-2023-5793: flusity CMS Dashboard customblock.php loadCustomBlocCreateForm cross site scripting

> Remote attackers can inject malicious scripts via the customblock_place argument in flusity CMS dashboard, potentially leading to session hijacking or code execution.

- **Severity:** Low 3.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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:** No
- **Published:** 26 Oct 2023
- **Updated:** 12 Jun 2025
- **Also known as:** GHSA-h2q3-xfj7-f8w8

## What is CVE-2023-5793?

CVE-2023-5793 is a low-severity cross-site scripting vulnerability in flusity CMS, published on 26 Oct 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A vulnerability was found in flusity CMS and classified as problematic. This issue affects the function loadCustomBlocCreateForm of the file /core/tools/customblock.php of the component Dashboard. The manipulation of the argument customblock_place leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The patch is named 81252bc764e1de2422e79e36194bba1289e7a0a5. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-243599.

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

## Which versions are affected by CVE-2023-5793?

It affects 1 product.


Products: Flusity Flusity.

## How do I fix CVE-2023-5793?

No fix has been published for CVE-2023-5793 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-5793 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-5793 exists.

## Other vulnerabilities in flusity CMS

- [CVE-2024-31666](https://insights.sbomify.com/CVE-2024-31666/): Code injection in n/a (critical 9.8)
- [CVE-2024-32418](https://insights.sbomify.com/CVE-2024-32418/): Code injection in n/a (critical 9.8)
- [CVE-2024-25502](https://insights.sbomify.com/CVE-2024-25502/): Path traversal in n/a (critical 9.8)
- [CVE-2024-23094](https://insights.sbomify.com/CVE-2024-23094/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2024-26350](https://insights.sbomify.com/CVE-2024-26350/): Cross-site request forgery in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-5793 and fix it if it is affected.

What it is: CVE-2023-5793 is a low-severity cross-site scripting vulnerability in flusity CMS, published on 26 Oct 2023. Any signed-in user can exploit it over the network, 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-2023-5793 exists.

Affected product: flusity CMS. 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-2023-5793/ (Markdown: https://insights.sbomify.com/CVE-2023-5793/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-5793
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-5793
- OSV: https://osv.dev/vulnerability/CVE-2023-5793

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-5793/
Summaries are generated and may contain mistakes; the official description above is the record.