CVE-2025-64180

Manager-io/Manager: Complete Bypass of SSRF Protection via Time-of-Check Time-of-Use (TOCTOU)

State: Published
Severity: 10.0 Critical
Published: Nov 7, 2025
Updated: Jan 7, 2026
Reserved: Oct 28, 2025

Description

Manager-io/Manager is accounting software. In Manager Desktop and Server versions 25.11.1.3085 and below, a critical vulnerability permits unauthorized access to internal network resources. The flaw lies in the fundamental design of the DNS validation mechanism. A Time-of-Check Time-of-Use (TOCTOU) condition that allows attackers to bypass network isolation and access internal services, cloud metadata endpoints, and protected network segments. The Desktop edition requires no authentication; the Server edition requires only standard authentication. This issue is fixed in version 25.11.1.3086.

Scores

CVSS	Score	Vector	Source
3.1	10.0 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
ManagerManager-io	< 25.11.1.3086Affected

References

https://github.com/Manager-io/Manager/security/advisories/GHSA-j2xj-xhph-p74j

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