Mesh Connect JS SDK Vulnerable to Cross Site Scripting via createLink.openLink
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| FrontFin | mesh-web-sdk | before 3.3.2 | 3.3.2 | Patch available | CNA |
| — | @meshconnect/web-link-sdk (npm) | before 3.3.2 | 3.3.2 | Patch available | GHSA-vh3f-qppr-j97f |
- mesh-web-sdk VendorFrontFin Affected before 3.3.2 Fixed in 3.3.2 Patch available CNA
- @meshconnect/web-link-sdk (npm) Vendor— Affected before 3.3.2 Fixed in 3.3.2 Patch available GHSA-vh3f-qppr-j97f
Remediation
- Fix · CNA mesh-web-sdk (FrontFin) Fixed in 3.3.2
- Fix · GHSA-vh3f-qppr-j97f @meshconnect/web-link-sdk (npm) Fixed in 3.3.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-59430
- 2026-10-03 Alias added: GHSA-vh3f-qppr-j97f
References
Other 5
- https://github.com/FrontFin/mesh-web-sdk/security/advisories/GHSA-vh3f-qppr-j97f
- https://github.com/FrontFin/mesh-web-sdk/pull/124
- https://github.com/FrontFin/mesh-web-sdk/commit/7f22148516d58e21a8b7670dde927d614c0d15c2
- https://github.com/FrontFin/mesh-web-sdk/blob/cf013b85ab95d64c63cbe46d6cb14695474924e7/packages/link/src/Link.ts#L441
- https://github.com/FrontFin/mesh-web-sdk
Sources
- CVE-2025-59430 · CVE Program
- CVE-2025-59430 · NVD
- FIRST EPSS
- GHSA-vh3f-qppr-j97f · GitHub Advisory Database · CC BY 4.0
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