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Vulnerability report

Exploited in the wild High confidence Not in CISA KEV

CVE-2023-39470

NG Remote Code Execution

PaperCut / NG · 22.0.10 65996

View live feed Monitor via API Watch CVE-2023-39470
Severity
CVSS 7.2 · High
Confidence
High
Exploit status
Exploited in the wild
EPSS
1.8%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2023-39470 is a vulnerability affecting PaperCut NG. PaperCut NG print.script.sandboxed Exposed Dangerous Function Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is high. Also confirmed by third-party sources.

Who is affected?

PaperCut / NG 22.0.10 65996.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

PaperCut NG print.script.sandboxed Exposed Dangerous Function Remote Code Execution Vulnerability

PaperCut NG print.script.sandboxed Exposed Dangerous Function Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of PaperCut NG. Authentication is required to exploit this vulnerability.

The specific flaw exists within the management of the print.script.sandboxed setting. The issue results from the exposure of a dangerous function. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-20965.

Vendor Product Affected Status
papercut papercut_ng 22.0.10 65996 Affected
PaperCut NG 22.0.10 65996 Affected
View vendor advisory (opens in new tab)
Published
22 Nov 2024
Exploitation Reported
01 Sep 2026
Attack vector
Remote
Complexity
Low
Privileges
High
User interaction
None

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2023-39470
  • vendor-provided URL papercut.com · Vendor Advisory https://www.papercut.com/kb/Main/SecurityBulletinJune2023/
  • ZDI-24-786 zerodayinitiative.com · CVE Record https://www.zerodayinitiative.com/advisories/ZDI-24-786/

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

The Shadowserver

Recorded 01 Sep 2026

Independent exploitation attestation added to the Previdian record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

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Source Added
The Shadowserver First 2026-09-01 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
0
User-Agents
0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

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

EPSS

1.8%

Weaknesses

Exposed Dangerous Method or Function CWE-749

All CVSS Scores

CVSS v3.1 7.2 High

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

CVSS v3.0 7.2 High

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Timeline

From disclosure to observed exploitation

  1. Added to Previdian KEV Feed

    High-confidence, third-party attested exploitation

  2. CVE published

    Vulnerability disclosed publicly

  3. CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2023-39470

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2023-39470",
  "confidence": "High",
  "cvss_score": 7.2,
  "cvss_estimated": false,
  "epss_score": 0.01756,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}