CVE-2025-4679

MEDIUM

Synology Active Backup for Microsoft 365 - Info Disclosure

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-4679. PoCs published by fevar54.

AI-analyzed exploit summary This repository contains an educational PoC for CVE-2025-4679, demonstrating an OAuth vulnerability where client secrets are exposed in HTTP redirects. It includes a vulnerable server simulation and secure alternatives for comparison.

Description

A vulnerability in Synology Active Backup for Microsoft 365 allows remote authenticated attackers to obtain sensitive information via unspecified vectors.

Exploits (1)

nomisec WORKING POC
by fevar54 · poc
https://github.com/fevar54/CVE-2025-4679-SecureOAuth-Demo---Enfoque-educativo

This repository contains an educational PoC for CVE-2025-4679, demonstrating an OAuth vulnerability where client secrets are exposed in HTTP redirects. It includes a vulnerable server simulation and secure alternatives for comparison.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Synology Active Backup for Microsoft 365 (simulated)
No auth needed
Prerequisites: Python 3.8+ · Git
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3

Scores

CVSS v3 6.5
EPSS 0.0106
EPSS Percentile 60.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-522
Status published
Products (1)
synology/active_backup_for_microsoft_365
Published May 16, 2025
Tracked Since Feb 18, 2026