CVE-2025-59451Public exploitNetwork attack vector

Persistent session hijacking via logout token reuse

Published Oct 6, 2025 · Updated Oct 6, 2025

Improper session management in YoSmart YoLink App through 2025-10-02 allows remote attackers with a valid token to hijack sessions. The server fails to invalidate session cookies at logout, and the MQTT interface accepts the associated token as a password for more than a week. Possession of a previously issued token is required; reuse preserves access to account settings and connected-device controls after the user logs out.

CVSS severity3.5
Low
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper session management in YoSmart YoLink App through 2025-10-02 allows remote attackers with a valid token to hijack sessions. The server fails to invalidate session cookies at logout, and the MQTT interface accepts the associated token as a password for more than a week. Possession of a previously issued token is required; reuse preserves access to account settings and connected-device controls after the user logs out.

The record

CVE
CVE-2025-59451
Published
Oct 6, 2025
Updated
Oct 6, 2025
Vendor
YoSmart
Product
YoLink App
Classifications
CWE-863, CWE-613, T1550.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2025-10-02

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

YoSmart · YoLink Appversion=0 <=2025-10-02

Published CVSS scores

3.5MITRECVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-613Insufficient Session Expiration
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo