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CVE Record

CVE-2025-69624: Nitro PDF Pro before 14.43 for Windows contains a NULL pointer dereference vulnerability in the JavaScript...

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.

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Nitro PDF Pro for Windows versions before 14.43 can crash when processing a malicious PDF that triggers a JavaScript app.alert() bug. The documented impact is availability loss, not data theft or code execution. Organizations using Nitro PDF Pro should prioritize updating because PDF readers are common phishing targets.

Executive priority

Treat as high priority for environments using Nitro PDF Pro, especially where staff receive external PDFs. The known impact is service disruption, but PDF-based delivery makes patching operationally important.

Technical view

The flaw is a NULL pointer dereference in Nitro PDF Pro’s JavaScript handling of app.alert(). A null first argument can enter a fallback string-conversion path, pass an invalid pointer onward, and cause an access violation. Reported vulnerable builds include 14.41.1.4 and 14.42.0.34.

Likely exposure

Exposure appears limited to Nitro PDF Pro for Windows before 14.43. Structured affected CPE data is absent in the bundle, so inventory should rely on installed product names and versions.

Exploitation context

No active exploitation is stated in the provided sources, and KEV is false. The source describes application crash when opening a crafted PDF, indicating a denial-of-service risk.

Researcher notes

Evidence supports a NULL pointer dereference and crash path, not code execution. The CVSS vector lists UI:N, while the description says the crash occurs when opening a crafted PDF; note this ambiguity during triage.

Mitigation direction

  • Upgrade Nitro PDF Pro for Windows to version 14.43 or later.
  • Review Nitro release notes and vendor guidance for any additional remediation advice.
  • Prioritize systems that open external or untrusted PDF attachments.
  • Limit automatic handling of untrusted PDFs until upgrades are complete.

Validation and detection

  • Inventory Nitro PDF Pro installations and record Windows version numbers.
  • Confirm no installed Nitro PDF Pro version is below 14.43.
  • Check email, endpoint, and document workflows for untrusted PDF exposure.
  • Review crash telemetry for Nitro PDF Pro access violations after PDF handling.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-476: Exact CWE lookup

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cve · low confidence lookup

CVE-2025-69624 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
2Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2025-69624Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

CWE-476

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-476 · source CWE mapping

NULL Pointer Dereference

NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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