CVE-2019-15623

Name: CVE-2019-15623
Creator: NVD / NIST
Published: 2020-02-04T20:15:12.667+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.92%

Last modified Jun 17, 2026

CVE-2019-15623 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Exposure of Private Information in Nextcloud Server 16.0.1 causes the server to send it's domain and user IDs to the Nextcloud Lookup Server without any further data when the Lookup server is disabled.. EPSS estimates a 1.92% chance of exploitation in the next 30 days.

Description

Exposure of Private Information in Nextcloud Server 16.0.1 causes the server to send it's domain and user IDs to the Nextcloud Lookup Server without any further data when the Lookup server is disabled.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.92%

77.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-359

Affected Software

Vendor	Product	Versions	Update
Nextcloud	Nextcloud Server	< 14.0.13	—
Nextcloud	Nextcloud Server	>= 15.0.0, < 15.0.9	—
Nextcloud	Nextcloud Server	>= 16.0.0, < 16.0.2	—
Opensuse	Backports Sle	15.0	Sp1
Suse	Package Hub	All versions	—

References

http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.htmlThird Party Advisory
https://hackerone.com/reports/508490Exploit, Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2019-016Third Party Advisory, Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.htmlThird Party Advisory
https://hackerone.com/reports/508490Exploit, Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2019-016Third Party Advisory, Vendor Advisory

Timeline

Published: Feb 4, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-15623?

How severe is CVE-2019-15623?

CVE-2019-15623 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.92% probability of exploitation in the next 30 days.

How do I fix CVE-2019-15623?

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-2019-15623?

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

Scan your code now

Source: NVD / NIST