UAA defaults email address to an insecure domain

published 2019-06-19 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-13418

cvss: 8.3; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Cloud Foundry UAA Release (OSS) v73.0.0

Exploit prediction

1.10% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	8.3	CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
NVD	3.0	8.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

Cloud Foundry UAA Release (OSS)

Classification

Weakness

CWE-840 Business Logic Errors
CWE-640 Weak Password Recovery Mechanism for Forgotten Password

References

cloudfoundry.org /blog/cve-2019-3787
vendor-advisory

Sources

CVE List CVE-2019-3787
NVD CVE-2019-3787

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary