# CVE-2023-33971: Formcreator vulnerable to stored XSS from ##FULLFORM##

> Stored XSS in GLPI Formcreator allows arbitrary JavaScript execution in admin contexts via the ##FULLFORM## tag.

- **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:** 31 May 2023
- **Updated:** 9 Jan 2025
- **Also known as:** GHSA-777g-3848-8r3g

## What is CVE-2023-33971?

CVE-2023-33971 is a medium-severity cross-site scripting vulnerability in pluginsGLPI formcreator, published on 31 May 2023. 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

Formcreator is a GLPI plugin which allow creation of custom forms and the creation of one or more tickets when the form is filled. A probable stored cross-site scripting vulnerability is present in Formcreator 2.13.5 and prior via the use of the use of `##FULLFORM##` for rendering. This could result in arbitrary javascript code execution in an admin/tech context. A patch is unavailable as of time of publication. As a workaround, one may use a regular expression to remove `< > "` in all fields.

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

## Which versions are affected by CVE-2023-33971?

It affects 1 product.


Products: Teclib-Edition Form Creator.

## How do I fix CVE-2023-33971?

No fix has been published for CVE-2023-33971 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-33971 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-33971 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-33971 and fix it if it is affected.

What it is: CVE-2023-33971 is a medium-severity cross-site scripting vulnerability in pluginsGLPI formcreator, published on 31 May 2023. 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-2023-33971 exists.

Affected product: pluginsGLPI formcreator. 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-2023-33971/ (Markdown: https://insights.sbomify.com/CVE-2023-33971/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-33971
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-33971
- OSV: https://osv.dev/vulnerability/CVE-2023-33971

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-33971/
Summaries are generated and may contain mistakes; the official description above is the record.