CVE-2025-69624
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk36th percentile - higher than 36% of all known CVEs
Summary
The vulnerability in Nitro PDF Pro for Windows before version 14.43 is a NULL pointer dereference in the JavaScript implementation of the app.alert() function. Calling app.alert() with more than one argument where the first argument evaluates to null (e.g., app.alert(app.activeDocs, true) when app.activeDocs is null) causes the engine to route through a fallback path for non-string arguments. In this path, js_ValueToString() returns an invalid string pointer, which is then passed to JS_GetStringChars() without validation, leading to an access violation and application crash when opening a crafted PDF.
Risk Assessment
The risk for the organization is the potential for remote application crash of Nitro PDF Pro by opening a malicious PDF file, which may result in loss of unsaved data and disruption of user work.
Recommendation
It is recommended to immediately upgrade Nitro PDF Pro to version 14.43 or later, which includes a fix for this vulnerability. Additionally, consider implementing security policies to restrict opening PDF files from untrusted sources.
Other vulnerabilities in Nitro PDF Pro
See all- CVE-2025-45528High
An issue in Nitro Software, Inc Nitro PDF Pro for macOS v.14.7 allows a local attacker to execute arbitrary code via a crafted PDF. The vulnerability requires a user to open a malicious document on the targeted system.
- CVE-2025-69627High
Nitro PDF Pro for Windows version 14.41.1.4 contains a heap use-after-free vulnerability in the implementation of the JavaScript method this.mailDoc(). During execution, an internal XID object is allocated and then freed prematurely, after which the freed pointer is still passed into UI and logging helper functions. This can result in access violations and non-deterministic crashes.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS