# CVE-2025-62820

## Summary

- **CVE ID:** CVE-2025-62820
- **Severity:** MEDIUM
- **CVSS Score:** 4.9 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L)
- **CWE:** CWE-420
- **Published:** Oct 23, 2025
- **Last Modified:** Mar 12, 2026

## Description

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

## Affected Products

- Slack — Nebula (0)

## References

- [CNA](https://github.com/slackhq/nebula/pull/1493)
- [CNA](https://github.com/slackhq/nebula/pull/1494)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 10.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._