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Vulnerability record · public intelligence
CVE-2023-27350
CRITICALCISA KEV

CVE-2023-27350

Published Apr 20, 2023 · Updated Nov 3, 2026

Severity · CVSSCRITICAL · Not scored
Known exploitationCISA KEV listed
EPSS / likelihood100.00%
QFinch risk scoreNot available

Original summary

Normalized public record · Updated Nov 3, 2026

This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-18987.

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-18987.

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

CISA-KEVFIRST-EPSSCVE-LIST-V5
SSVC priority
IMMEDIATE
Confidence
Not available
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. www.zerodayinitiative.com ↗
  2. www.papercut.com ↗
  3. packetstormsecurity.com ↗
  4. packetstormsecurity.com ↗
  5. news.sophos.com ↗
  6. packetstormsecurity.com ↗
  7. packetstormsecurity.com ↗
  8. CISA advisory ↗

Record history

Published Apr 20, 2023 · Last refreshed Nov 3, 2026

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