What’s Vulnerable › Vulnerabilities

CVE-2019-3787: UAA defaults email address to an insecure domain

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-06-19 · updated 2026-06-17
• Weakness: CWE-840

Description

Cloud Foundry UAA, versions prior to 73.0.0, falls back to appending “unknown.org” to a user's email address when one is not provided and the user name does not contain an @ character. This domain is held by a private company, which leads to attack vectors including password recovery emails sent to a potentially fraudulent address. This would allow the attacker to gain complete control of the user's account.

Affected products

• Cloud Foundry UAA Release (OSS): before 73.0.0 — fixed in 73.0.0

How to fix

Upgrade to a fixed version: Cloud Foundry UAA Release (OSS) 73.0.0. Check the vendor advisory for mitigations.

References

• https://www.cloudfoundry.org/blog/cve-2019-3787
• https://www.cloudfoundry.org/blog/cve-2019-3787

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