NVD / CVE Program· CNA hackerone

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.

Noroxi assessment

Priority: Monitor (action score 32/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 1.1% (FIRST EPSS); higher than 66.3% of all records.
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
Fixed version: nextcloud (openSUSE:Leap 15.1) 15.0.14-bp151.3.3.1; nextcloud (SUSE:Package Hub 12) 15.0.14-bp151.3.3.1; nextcloud (SUSE:Package Hub 15 SP1) 15.0.14-bp151.3.6.1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to nextcloud (openSUSE:Leap 15.1) 15.0.14-bp151.3.3.1; nextcloud (SUSE:Package Hub 12) 15.0.14-bp151.3.3.1; nextcloud (SUSE:Package Hub 15 SP1) 15.0.14-bp151.3.6.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

HighCVSS 8.0 · v3.1—No exploit Fix available

Published: Feb 4, 2020
Updated: Jun 16, 2026
EPSS: 1.1% · 66th percentile
CWE: CWE-20

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 32 / 40 · 8.0 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.1%

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Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
nextcloud	nextcloud server	cpe:2.3:a:nextcloud:nextcloud_server
opensuse	backports	cpe:2.3:o:opensuse:backports

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

nextcloud nextcloud serverbefore 15.0.14
nextcloud nextcloud server16.0.0 and later · before 16.0.7
nextcloud nextcloud server17.0.0 and later · before 17.0.2
opensuse backportssle-15

Versions reported by the vendor

Affected version ranges reported by the assigning authority (hackerone). Independent of NVD's CPE analysis and usually ahead of it.

n/a Nextcloud Server
- 17.0.2affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
openSUSE:Leap 15.1	nextcloud	before 15.0.14-bp151.3.3.1	15.0.14-bp151.3.3.1
SUSE:Package Hub 12	nextcloud	before 15.0.14-bp151.3.3.1	15.0.14-bp151.3.3.1
SUSE:Package Hub 15 SP1	nextcloud	before 15.0.14-bp151.3.6.1	15.0.14-bp151.3.6.1

Same product

nextcloud: all records

Other highest-scoring records for the same primary product.

CVE-2023-26482Scope of workflow operations is not validated in nextcloud server
40Plan
CVE-2021-32802Preview generation used third-party library not suited for user-generated content in Nextcloud server
40Plan
CVE-2021-32726Webauthn tokens not removed after user has been deleted
40Plan

Published before and after this one in the same product

← EarlierCVE-2019-5451Jul 30, 2019 · Bypass lock protection in the Nextcloud Android app prior to version 3.6.1 allows accessing the files when repeatedly opening and closing th
18Monitor
← EarlierCVE-2019-15612Feb 4, 2020 · A bug in Nextcloud Server 15.0.2 causes pending 2FA logins to not be correctly expired when the password of the user is reset.
23Monitor
Later →CVE-2019-15616Feb 4, 2020 · Dangling remote share attempts in Nextcloud 16 allow a DNS pollution when running long.
17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
opensuse:nextcloud	15.0.14-bp151.3.3.1 · openSUSE:Leap 15.1	Package registry (OSV)
suse:nextcloud	15.0.14-bp151.3.3.1 · SUSE:Package Hub 12	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope