CVE-2025-59430Public exploitNetwork attack vector

Parent-page script execution via unvalidated iframe URL

Published Sep 22, 2025 · Updated Sep 22, 2025

Cross-site scripting in Mesh Connect JS SDK before 3.3.2 allows remote attackers to execute JavaScript in an integrating page. createLink.openLink base64-decodes a link token and assigns the result to an iframe src without validating its URL protocol. A victim must open an attacker-controlled link; the script then runs in the parent page context and can read its DOM, storage, session data, and cookies or replace a selected iframe.

CVSS severity8.2
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Mesh Connect JS SDK before 3.3.2 allows remote attackers to execute JavaScript in an integrating page. createLink.openLink base64-decodes a link token and assigns the result to an iframe src without validating its URL protocol. A victim must open an attacker-controlled link; the script then runs in the parent page context and can read its DOM, storage, session data, and cookies or replace a selected iframe.

The record

CVE
CVE-2025-59430
Published
Sep 22, 2025
Updated
Sep 22, 2025
Vendor
Mesh Connect
Product
Mesh Connect JS SDK
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 3.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mesh Connect · Mesh Connect JS SDKversion=< 3.3.2

Published CVSS scores

8.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

Public exploit references

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

Technologies

Your stack

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Your stack

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