Paper/Archive/CVE-2025-65200

CVE-2025-65200

mitre — An issue was discovered in localstack 4.9.2 allowing attackers to execute arbitrary code via crafted content hosted on a web-accessable U…

EPSS 0.6%public exploit CVSS 9.6

critical.is priorityof 100

CVSS 9.6 (ADP)9.6 / 10 × 3028.8 Not in CISA KEV+300.0 EPSS percentile 46.0.460 × 209.2 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

An issue was discovered in localstack 4.9.2 allowing attackers to execute arbitrary code via crafted content hosted on a web-accessable URL and when passed said URL in the the templateURL to the _localstack/cloudformation/deploy endpoint, the hosted content can get executed in the context of the docker container.

Affected

ProductAffectedFixed inSource

n/an/a–CNA

Scores by source

CISA ADP9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

reflocalstack.com refgithub.com/localstack/localstack/blob/aba1ee84592d76f0a88dd286fcd83b65080e31ac/localstack-core/localstack/services/cloudformation/deploy_ui.py refgithub.com/localstack/localstack/pull/13293 refcyberroute.github.io/post/2025-12-11-localstack-hack