CVE Catalog

CVE-2025-62820

MediumCVSS 4.9
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.22%

11th percentile - higher than 11% of all known CVEs

Summary

Slack Nebula before 1.9.7 mishandles CIDR in some configurations, thus accepting arbitrary source IP addresses within the Nebula network. This may allow unauthorized network access.

Risk Assessment

An attacker could gain access to the Nebula network from any IP address, bypassing intended restrictions, potentially leading to unauthorized access to resources. The risk applies to all Slack Nebula deployments version < 1.9.7.

Recommendation

Update Slack Nebula to version 1.9.7 or later. Additionally, verify CIDR configuration and firewall rules.

Related vulnerabilities

Original NVD description (English source)

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

Vulnerability data from NVD (NIST) · CISA KEV · EPSS