XSS in Frontfin Mesh-Web-Sdk
CVE-2025-59430
Mesh Connect JS SDK contains JS libraries for integrating with Mesh Connect. Prior to version 3.3.2, the lack of sanitization of URLs protocols in the createLink.openLink function enables the execution of arbitrary JavaScript code within the context of the parent page. This is technically indistinguishable from a real page at the rendering level and allows access to the parent page DOM, storage, session, and cookies. If the attacker can specify customIframeId, they can hijack the source of existing iframes. This issue has been patched in version 3.3.2.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.004 (36.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N.
Affected products
- Frontfin Mesh-web-sdk — versions < 3.3.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-59430?
- CVE-2025-59430 is a high-severity vulnerability in Frontfin Mesh-Web-Sdk, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2025-09-22.
- How severe is CVE-2025-59430?
- High severity. CVSS v3 base score is 8.2 out of 10.