CVE-2018-12678

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-06-22 · updated 2026-06-17
Weakness: CWE-918

Description

Portainer before 1.18.0 supports unauthenticated requests to the websocket endpoint with an unvalidated id query parameter for the /websocket/exec endpoint, which allows remote attackers to bypass intended access restrictions or conduct SSRF attacks.

Affected products

portainer: before 1.18.0 — fixed in 1.18.0

How to fix

Upgrade to a fixed version: portainer 1.18.0. Check the vendor advisory for mitigations.

References

https://github.com/portainer/portainer/pull/1979
https://github.com/portainer/portainer/releases/tag/1.18.0
https://github.com/portainer/portainer/pull/1979
https://github.com/portainer/portainer/releases/tag/1.18.0

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