---
id: CVE-2025-69723
title: >-
  A reflected cross-site scripting (XSS) vulnerability in localstack v4.9.2
  allows attackers to execute arbitrary Javascript in the context of the user's
  browser via a crafted URL.
summary: >-
  A reflected cross-site scripting (XSS) vulnerability in localstack v4.9.2
  allows attackers to execute arbitrary Javascript in the context of the user's
  browser via a crafted URL.
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cvssSource: adp
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-26T19:09:15.954458Z'
exploitAvailable: true
published: '2026-10-22'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T19:39:56.898Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-69723'
references:
  - url: 'https://cyberroute.github.io/post/2025-12-11-localstack-hack/'
tags:
  - cve.org
  - exploit-available
epss: 0.0023
epssPercentile: 0.13716
ingestedAt: '2026-10-22T22:00:50.363Z'
---

## Overview

A reflected cross-site scripting (XSS) vulnerability in localstack v4.9.2 allows attackers to execute arbitrary Javascript in the context of the user's browser via a crafted URL.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.