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Vulnerability record · CVE-2025-66523 · published 20 January 2026

CVE-2025-66523: Foxit esign cross-site scripting vulnerability

Foxit · Esign

URL parameters are directly embedded into JavaScript code or HTML attributes without proper encoding or sanitization. This allows attackers to inject arbitrary scripts when an authenticated user visits a crafted link. This issue affects na1.foxitesign.foxit.com: before 2026‑01‑16.

6.1 CVSS 3.1 Medium EPSS 0.19% · top 92.5% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

URL parameters are directly embedded into JavaScript code or HTML attributes without proper encoding or sanitization. This allows attackers to inject arbitrary scripts when an authenticated user visits a crafted link. This issue affects na1.foxitesign.foxit.com: before 2026‑01‑16.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.foxit.com/support/security-bulletins.html Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2025-66523), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.