CVE-2025-62820

Oct. 23, 2025, 4:18 a.m.

4.9
Medium

Description

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

Product(s) Impacted

Vendor Product Versions
Slack
  • Nebula
  • <1.9.7

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-420
Unprotected Alternate Channel
The product protects a primary channel, but it does not use the same level of protection for an alternate channel.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a slack nebula <1.9.7 / / / / / / /

References

https://github.com/slackhq/nebula/pull/1493
https://github.com/slackhq/nebula/pull/1494

Tags

cve@mitre.org
CWE-420
2025-10-23
CVE-2025-62820

CVSS Score

4.9 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: HIGH
  • Privileges Required: LOW
  • Scope: CHANGED
  • Confidentiality Impact: NONE
  • Integrity Impact: LOW
  • Availability Impact: LOW

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

    View Vector String

Timeline

Published: Oct. 23, 2025, 4:18 a.m.
Last Modified: Oct. 23, 2025, 4:18 a.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

cve@mitre.org

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.