---
id: CVE-2025-69624
title: >-
  Nitro PDF Pro before 14.43 for Windows contains a NULL pointer dereference
  vulnerability in the JavaScript implementation of app.alert()
summary: >-
  Nitro PDF Pro before 14.43 for Windows contains a NULL pointer dereference
  vulnerability in the JavaScript implementation of app.alert(). When
  app.alert() is called with more than one argument and the first argument
  evaluates to null (fo…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
vendor: gonitro
product: nitro_pdf_pro
affected:
  - nitro_pdf_pro = 14.41.1.4
published: '2026-04-13'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T12:10:00.230'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-69624'
references:
  - url: 'https://www.gonitro.com/documentation/release-notes'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.00428
epssPercentile: 0.3551
ingestedAt: '2026-10-15T13:06:33.272Z'
---

## Overview

Nitro PDF Pro before 14.43 for Windows contains a NULL pointer dereference vulnerability in the JavaScript implementation of app.alert(). When app.alert() is called with more than one argument and the first argument evaluates to null (for example, app.alert(app.activeDocs, true) when app.activeDocs is null), the engine routes the call through a fallback path intended for non-string arguments. In this path, js_ValueToString() is invoked on the null value and returns an invalid string pointer, which is then passed to JS_GetStringChars() without validation. Dereferencing this pointer leads to an access violation and application crash when opening a crafted PDF. For example, 14.41.1.4 and 14.42.0.34 have been reported as vulnerable.

## Affected

- `nitro_pdf_pro = 14.41.1.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.