CVE-2023-27351

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.781 · 100 %ileEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV

Likely / severe?

78.1% (100th) EPSS

CVSS 7.5 · high

Is it mine?

15 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2026-04-20remediate by 2026-05-04

required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

EPSS · scored 2026-10-27

PaperCut NG/MF Improper Authentication Vulnerability

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 SecurityRequestFilter class. The issue results from improper implementation of the authentication algorithm. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-19226.

cvss

Technical severity, 0–10. One row per scoring source.

8.2

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.08.2highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:Nsecondary · ENISA EU

v3.08.2highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:Nsecondary · zdi-disclosures@trendmicro.comexploitability 3.9 · impact 4.2

v3.18.2highAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284USCWE-287US

affected products (15)

Products and version ranges known to be affected.

PaperCut NG≤ 22.0.5 (Build 63914)enisa_euvdEU
PaperCut Software International Pty Ltd PaperCut MF≤ с 15.0.0 по 19.2.7fstec_bduRU
PaperCut Software International Pty Ltd PaperCut MF≤ с 20.0.0 по 20.1.6fstec_bduRU
PaperCut Software International Pty Ltd PaperCut MF≤ с 21.0.0 по 21.2.10fstec_bduRU
PaperCut Software International Pty Ltd PaperCut MF≤ с 22.0.0 по 22.0.8fstec_bduRU
PaperCut Software International Pty Ltd PaperCut NG≤ с 21.0.0 по 21.2.10fstec_bduRU
PaperCut Software International Pty Ltd PaperCut NG≤ с 15.0.0 по 19.2.7fstec_bduRU
PaperCut Software International Pty Ltd PaperCut NG≤ с 22.0.0 по 22.0.8fstec_bduRU
PaperCut Software International Pty Ltd PaperCut NG≤ с 20.0.0 по 20.1.6fstec_bduRU
papercut papercut mf15.0 → 20.1.7nvdUScpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*
papercut papercut mf21.0.0 → 21.2.11nvdUScpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*
papercut papercut mf22.0.0 → 22.0.9nvdUScpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*
papercut papercut ng15.0 → 20.1.7nvdUScpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*
papercut papercut ng21.0.0 → 21.2.11nvdUScpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*
papercut papercut ng22.0.0 → 22.0.9nvdUScpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2023-04-20modified 2026-10-01

references (8)

External citations — patches, advisories, analysis.

scry

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