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PatchSiren cyber security CVE debrief

CVE-2023-27350 PaperCut CVE debrief

CVE-2023-27350 is an improper access control issue affecting PaperCut MF/NG. CISA added it to the Known Exploited Vulnerabilities catalog on 2023-04-21 and marked it as having known ransomware campaign use, so this should be treated as a high-priority patching item.

Vendor
PaperCut
Product
MF/NG
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2023-04-21
Original CVE updated
2023-04-21
Advisory published
2023-04-21
Advisory updated
2023-04-21

Who should care

Organizations running PaperCut MF/NG, along with system, security, and endpoint-management teams responsible for patching and validating vendor updates.

Technical summary

The vulnerability is described at a high level as an improper access control issue in PaperCut MF/NG. The available official metadata does not provide deeper technical detail here, but CISA’s KEV listing confirms known exploitation and requires applying vendor updates per instructions.

Defensive priority

High. CISA’s KEV inclusion and known ransomware campaign use indicate active real-world risk and a need to remediate promptly.

Recommended defensive actions

  • Apply the vendor-recommended updates for PaperCut MF/NG as soon as possible.
  • Verify which systems in your environment run PaperCut MF/NG and prioritize them for remediation.
  • Use the official CISA KEV entry and vendor guidance to confirm the required fix path.
  • After patching, review affected systems for unexpected access or configuration changes.

Evidence notes

This debrief is based only on the supplied CVE metadata and official links. The CVE and source item are dated 2023-04-21. CISA KEV metadata identifies the issue as PaperCut MF/NG Improper Access Control Vulnerability, marks known ransomware campaign use as 'Known,' and states: 'Apply updates per vendor instructions.' No unsupported impact or exploit details were added.

Official resources

Publicly listed by CISA in the Known Exploited Vulnerabilities catalog on 2023-04-21; the CVE was also published on 2023-04-21.