What’s Vulnerable › Vulnerabilities

CVE-2019-15617

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-04 · updated 2026-06-17
• Weakness: CWE-287

Description

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

Affected products

• Nextcloud Server: before 17.0.1 — fixed in 17.0.1

How to fix

Upgrade to a fixed version: Nextcloud Server 17.0.1. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/722748
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-006
• https://hackerone.com/reports/722748
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-006

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