HIGHCVSS 7.5Actively exploited · CISA KEV since 2026-04-20Vulnerability

CVE-2023-27351

PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class.

Properties

Euvd product
NG
Vulnerability name
PaperCut NG/MF Improper Authentication Vulnerability
First seen
2026-10-01T18:09:39+00:00
Cvss score
7.5
Epss score
0.78052
Last seen
2026-10-19T12:00:27+00:00
Due date
2026-05-04
Euvd assigner
zdi
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2026-04-20T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2026-04-20
Score
7.5
Euvd base score version
3.0
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
PaperCut
Cvss vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
In Signal since
initial import (Sep 2026)
Euvd base score
8.2

Related Entities (7)

AFFECTS_PRODUCT (2)

→[Product]cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*

MENTIONED_IN (2)

→[Campaign]Storm-1175 focuses gaze on vulnerable web-facing assets in high ...
→[Campaign]Unnamed campaign (ID 69d4…)

DESCRIBES (1)

←[KEVEntry]PaperCut NG/MF Improper Authentication Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Improper Authentication

INVOLVES (1)

←[Signal]kev_added · 2026-04-20

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CVE-2023-27351 (CVSS 7.5) — Ninja Signal Threat Intelligence | Ninja Signal