CASCACascade Atlas

Evidence dossier

CVE-2023-27350

CVE-2023-27350

84.5–99.5Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
Apr 20, 2023
Updated
Oct 21, 2025
Evidence coverage
85%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS100.00%

2026-07-18 · v2026.06.15 · percentile 100.0%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

zdioriginal assertion
container

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.

CISA KEVoriginal assertion
observed_exploitation

PaperCut MF/NG Improper Access Control Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.999990000000; percentile 0.999910000000

Applicability

Cited product scope

Trace impact →
PaperCutNG
[{"status": "affected", "version": "22.0.5 (Build 63914)"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*; start including 8.0; end excluding 20.1.7supported
Unknown vendorUnknown product
cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*; start including 21.0.0; end excluding 21.2.11supported
Unknown vendorUnknown product
cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*; start including 22.0.0; end excluding 22.0.9supported
Unknown vendorUnknown product
cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*; start including 8.0; end excluding 20.1.7supported
Unknown vendorUnknown product
cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*; start including 21.0.0; end excluding 21.2.11supported
Unknown vendorUnknown product
cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*; start including 22.0.0; end excluding 22.0.9supported

Assessments

CVSS by origin

9.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
zdi-disclosures@trendmicro.comCVSS 3.0 · role SecondaryCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
zdiCVSS 3.0 · role unknownCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.