# CVE-2023-3970: GZ Scripts Availability Booking Calendar PHP Image cross site scripting

> Attackers can inject malicious scripts via the image handler in GZ Scripts Availability Booking Calendar PHP, potentially compromising user sessions.

- **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:** 27 Jul 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-hwq8-g9f3-x385

## What is CVE-2023-3970?

CVE-2023-3970 is a low-severity cross-site scripting vulnerability in GZ Scripts Availability Booking Calendar PHP, published on 27 Jul 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, which was classified as problematic, was found in GZ Scripts Availability Booking Calendar PHP 1.0. This affects an unknown part of the file /index.php?controller=GzUser&action=edit&id=1 of the component Image Handler. The manipulation of the argument img leads to cross site scripting. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-235569 was assigned to this vulnerability.

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

## Which versions are affected by CVE-2023-3970?

It affects 1 product.


Products: Gzscripts Availability Booking Calendar Php.

## How do I fix CVE-2023-3970?

No fix has been published for CVE-2023-3970 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-3970 being exploited?

There is no known exploitation of CVE-2023-3970 in the wild and no public exploit code.

## Other vulnerabilities in GZ Scripts Availability Booking Calendar PHP

- [CVE-2023-3969](https://insights.sbomify.com/CVE-2023-3969/): GZ Scripts Availability Booking Calendar PHP HTTP POST Request index.php cross site scripting (low 3.5)
- [CVE-2023-3543](https://insights.sbomify.com/CVE-2023-3543/): GZ Scripts Availability Booking Calendar PHP HTTP POST Request load.php cross site scripting (low 3.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-3970 and fix it if it is affected.

What it is: CVE-2023-3970 is a low-severity cross-site scripting vulnerability in GZ Scripts Availability Booking Calendar PHP, published on 27 Jul 2023. 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-2023-3970 in the wild and no public exploit code.

Affected product: GZ Scripts Availability Booking Calendar PHP. 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-2023-3970/ (Markdown: https://insights.sbomify.com/CVE-2023-3970/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3970
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3970
- OSV: https://osv.dev/vulnerability/CVE-2023-3970

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-3970/
Summaries are generated and may contain mistakes; the official description above is the record.