What is CVE-2019-15613?

CVE-2019-15613 is a high-severity vulnerability in Nextcloud Server, classified under Improper Input Validation. CVSS score: 8.0/10. Published 2020-02-04.

How severe is CVE-2019-15613?

High severity. CVSS v3 base score is 8.0 out of 10.

Improper input validation in Nextcloud Server

CVE-2019-15613

A bug in Nextcloud Server 17.0.1 causes the workflow rules to depend their behaviour on the file extension when checking file mimetypes.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2020-02-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (65.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Nextcloud Server
openSUSE Backports — versions sle-15
Nextcloud Server — versions 17.0.2

Weakness classification (CWE)

References

hackerone.com/reports/697959 (Patch, Third Party Advisory)
nextcloud.com/security/advisory/ (Broken Link, Vendor Advisory)
lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.html (vendor-advisory, Mailing List, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.html (vendor-advisory, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2019-15613?: CVE-2019-15613 is a high-severity vulnerability in Nextcloud Server, classified under Improper Input Validation. CVSS score: 8.0/10. Published 2020-02-04.
How severe is CVE-2019-15613?: High severity. CVSS v3 base score is 8.0 out of 10.