CVE-2019-15617

Name: CVE-2019-15617
Creator: NVD / NIST
Published: 2020-02-04T20:15:12.183+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.61%

Last modified Jun 17, 2026

CVE-2019-15617 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A missing check in Nextcloud Server 17.0.0 allowed an attacker to set up a new second factor when trying to login.. EPSS estimates a 0.61% chance of exploitation in the next 30 days.

Description

A missing check in Nextcloud Server 17.0.0 allowed an attacker to set up a new second factor when trying to login.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.61%

44.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	< 17.0.1

References

https://hackerone.com/reports/722748Permissions Required
https://nextcloud.com/security/advisory/?id=NC-SA-2020-006Vendor Advisory
https://hackerone.com/reports/722748Permissions Required
https://nextcloud.com/security/advisory/?id=NC-SA-2020-006Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2019-15617?

A missing check in Nextcloud Server 17.0.0 allowed an attacker to set up a new second factor when trying to login.

How severe is CVE-2019-15617?

CVE-2019-15617 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.61% probability of exploitation in the next 30 days.

How do I fix CVE-2019-15617?

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-2019-15617?

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

Scan your code now

Source: NVD / NIST