CVE-2025-62820 MEDIUM

CVE-2025-62820

Vendor Slack
Product Nebula
Weakness CWE-420
Published October 23, 2025
Last update October 23, 2025
View on NVD All CVEs

CVSS base score

4.9/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L

What the vulnerability does

01Description

Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.

Key dates

02Disclosure timeline

October 23, 2025 CVE published
October 23, 2025 Record updated