What’s Vulnerable › Vulnerabilities

CVE-2019-15619

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% 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-79

Description

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.

Affected products

• Nextcloud Deck: before 0.6.6 — fixed in 0.6.6
• Nextcloud Server: before 16.0.4 — fixed in 16.0.4
• Nextcloud Talk: before 6.0.4 — fixed in 6.0.4

How to fix

Upgrade to a fixed version: Nextcloud Deck 0.6.6; Nextcloud Server 16.0.4; Nextcloud Talk 6.0.4. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/662204
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-008
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-009
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-010
• https://hackerone.com/reports/662204
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-008
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-009
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-010

Get alerted when CVE-2019-15619 or the next vulnerability affects your stack