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CVE-2018-1221

20
FAUCET Score

CVE-2018-1221 describes a vulnerability in Cloud Foundry's Gorouter, specifically affecting cf-deployment before 1.14.0 and routing-release before 0.172.0, where it improperly handles WebSocket requests when used with AWS Application Load Balancers (ALBs) and similar HTTP-aware load balancers. This flaw allows a developer-privileged user to potentially steal data or launch denial-of-service attacks. With a CVSS score of 8.1 (HIGH), the vulnerability has a network attack vector, low attack complexity, and high impact on confidentiality and availability. Despite its severity, there is no evidence of active exploitation, no public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.14.0CPE matchmatch criteria
cpe:2.3:a:cloudfoundry:cf-deployment:*:*:*:*:*:*:*:*
< 0.172.0CPE matchmatch criteria
cpe:2.3:a:cloudfoundry:routing-release:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.23%
Probability of exploitation in next 30 days
EPSS Percentile
65.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0123 is in the 63rd percentile among its peer group of 17,822 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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