What is CVE-2019-15619?

CVE-2019-15619 is a medium-severity vulnerability in Nextcloud Deck, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2020-02-04.

How severe is CVE-2019-15619?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Nextcloud Deck

CVE-2019-15619

Improper neutralization of file names, conversation names and board names in Nextcloud Server 16.0.3, Nextcloud Talk 6.0.3 and Nextcloud Deck 0.6.5 causes an XSS when linking them with each others in a project.

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Nextcloud Deck
Nextcloud Server
Nextcloud Talk
Nextcloud Server — versions 16.0.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

hackerone.com/reports/662204 (Permissions Required)
nextcloud.com/security/advisory/ (Vendor Advisory)
nextcloud.com/security/advisory/ (Vendor Advisory)
nextcloud.com/security/advisory/ (Vendor Advisory)

Frequently asked questions

What is CVE-2019-15619?: CVE-2019-15619 is a medium-severity vulnerability in Nextcloud Deck, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2020-02-04.
How severe is CVE-2019-15619?: Medium severity. CVSS v3 base score is 4.8 out of 10.