CVE-2018-1221

Name: CVE-2018-1221
Creator: NVD / NIST
Published: 2018-03-19T18:29:00.547+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2018-1221 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. In cf-deployment before 1.14.0 and routing-release before 0.172.0, the Cloud Foundry Gorouter mishandles WebSocket requests for AWS Application Load Balancers (ALBs) and some other HTTP-aware Load Balancers. A user with developer privileges could use this vulnerability to steal data or cause denial of service.. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

In cf-deployment before 1.14.0 and routing-release before 0.172.0, the Cloud Foundry Gorouter mishandles WebSocket requests for AWS Application Load Balancers (ALBs) and some other HTTP-aware Load Balancers. A user with developer privileges could use this vulnerability to steal data or cause denial of service.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS Probability

1.23%

65.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Cloudfoundry	Cf-Deployment	< 1.14.0
Cloudfoundry	Routing-Release	< 0.172.0

References

https://www.cloudfoundry.org/blog/cve-2018-1221/Third Party Advisory
https://www.cloudfoundry.org/blog/cve-2018-1221/Third Party Advisory

Timeline

Published: Mar 19, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1221?

How severe is CVE-2018-1221?

CVE-2018-1221 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1221?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1221?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST