Security readout for executives and security teams
CVE-2023-27350 lets an unauthenticated remote attacker bypass PaperCut NG authentication and run code as SYSTEM. For executives, this is a direct server takeover risk for exposed print-management infrastructure, with confirmed real-world exploitation in CISA KEV and reporting from Sophos. Highest exposure is internet-reachable or broadly reachable PaperCut NG servers, especially version 22.0.5 Build 63914 per the source bundle. Internal-only servers still matter because SYSTEM-level code execution can enable lateral movement after initial network access. Treat as emergency remediation for any exposed PaperCut server. The combination of unauthenticated remote access, SYSTEM execution, critical CVSS 9.8 severity, and KEV-confirmed exploitation makes delay materially risky. Mitigation focus: Identify all PaperCut NG deployments and their exact build numbers.; Apply PaperCut's vendor guidance for PO-1216 and PO-1219 immediately.; Restrict PaperCut server access to trusted networks and administrators..
Michael Williams reviewed this cited source version on .
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Open ATT&CK lookupExecution behavior lookup
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Open ATT&CK lookupCVE-2023-27350 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.0)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
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CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9.8CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.zerodayinitiative.com/advisories/ZDI-23-233/CVE reference
- https://www.papercut.com/kb/Main/PO-1216-and-PO-1219CVE reference
- https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/CVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350CVE reference · government-resource
Products and packages named in the record
CWE details
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Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.