CVE-2023-3486Network attack vector

Unauthenticated file upload via authentication bypass

Published Jul 25, 2023 · Updated Oct 23, 2024

Authentication bypass in PaperCut NG before 22.1.3 allows remote attackers to upload arbitrary files through the application server. The file-upload path accepts attacker-controlled content without authentication and stores it in the host's file storage. Remote unauthenticated access is sufficient, and repeated uploads can exhaust system resources and interrupt service operation.

CVSS severity7.5
High
EPSS probability79.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in PaperCut NG before 22.1.3 allows remote attackers to upload arbitrary files through the application server. The file-upload path accepts attacker-controlled content without authentication and stores it in the host's file storage. Remote unauthenticated access is sufficient, and repeated uploads can exhaust system resources and interrupt service operation.

The record

CVE
CVE-2023-3486
Published
Jul 25, 2023
Updated
Oct 23, 2024
Vendor
PaperCut
Product
PaperCut NG
Classifications
CWE-434, CAPEC-115, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 23, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <22.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PaperCut · PaperCut NGversion=0 <22.1.3

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.2TenableCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-115Authentication Bypass
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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