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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
CRITICAL 9.8
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.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-27350 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-27350

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2023-27350 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-27350

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.