CVE-2025-59803: pdf editor Signature Bypass — Fix

Description

Foxit PDF Editor and Reader before 2025.2.1 allow signature spoofing via triggers. An attacker can embed triggers (e.g., JavaScript) in a PDF document that execute during the signing process. When a signer reviews the document, the content appears normal. However, once the signature is applied, the triggers modify content on other pages or optional content layers without explicit warning. This can cause the signed PDF to differ from what the signer saw, undermining the trustworthiness of the digital signature. The fixed versions are 2025.2.1, 14.0.1, and 13.2.1.

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CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-347 CWE-347

Affected Products

Vendor	Product	Versions
foxit	pdf_editor	< 13.2.0.63256
foxit	pdf_editor	2023.1.0.55583 — 2023.3.0.63083
foxit	pdf_editor	2024.1.0.63682 — 2024.4.1.66479
foxit	pdf_editor	All
foxit	pdf_editor	All
foxit	pdf_editor	All
foxit	pdf_reader	< 2025.2.0.68868
apple	macos	All
foxit	pdf_editor	< 13.2.0.23874
foxit	pdf_editor	2023.1.0.15510 — 2023.3.0.23028
foxit	pdf_editor	2024.1.0.23997 — 2024.4.1.27687
foxit	pdf_editor	All
foxit	pdf_editor	All
foxit	pdf_editor	All
foxit	pdf_reader	< 2025.2.0.33046
microsoft	windows	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-59803? +

Foxit PDF Editor and Reader before 2025.2.1 allow signature spoofing via triggers. An attacker can embed triggers (e.g., JavaScript) in a PDF document that execute during the signing process. When a signer reviews the document, the content appears normal. However, once the signature is applied, the triggers modify content on other pages or optional content layers without explicit warning. This can cause the signed PDF to differ from what the signer saw, undermining the trustworthiness of the digital signature. The fixed versions are 2025.2.1, 14.0.1, and 13.2.1. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-59803? +

CVE-2025-59803 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-59803? +

CVE-2025-59803 affects products from apple, foxit, microsoft, specifically: macos, pdf_editor, pdf_reader, windows. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59803? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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