CVE Intel / CVE-2023-27350

CVE-2023-27350

Papercut Mf · papercut

⚠

Actively exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalogue: exploitation confirmed in the wild. Patch on priority.

Patch now

This CVE is being exploited. Apply the vendor fix, or take the service off the internet until you can, then check your logs for attempts.

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CISA KEVexploited on our sensorsCritical CVSS 9.8network detectablepublic exploit: ExploitDB, Metasploit

What it is

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.

Live exploitation on the huntback network (30 days)

attempts captured

distinct source IPs

2026-11-10

last seen

Detection

huntback carries a network signature for this CVE. Exploitation attempts are detected on the decoy fleet in real time.

ExploitDBExploit code published (ExploitDB)

MetasploitExploit code published (Metasploit)

NucleiNuclei detection template available

Evidence

Confirmed exploited. Our decoys saw 4 exploitation attempts in the last 14 days; CISA added it to KEV 1301 days ago.

2026-11-10Observed · huntback decoys
Last attempt. 14 attempts on our decoys, 4 in the last 14 days

2026-10-02Observed · huntback decoys
First exploitation attempt on our decoys

2023-04-21Reported · CISA KEV
Added to CISA Known Exploited Vulnerabilities

2023-04-20Context · CVE record
Published

undatedWeaponised · ExploitDB
Exploit code published (ExploitDB)

undatedWeaponised · Metasploit
Exploit code published (Metasploit)

undatedWeaponised · Nuclei
Nuclei detection template available

Observed: our own decoys saw it. Reported: CISA, the vendor or another named source says so. Weaponised: public exploit code or a scanner template exists. Methodology

Questions

Is CVE-2023-27350 being exploited in the wild?

Yes. The huntback decoy network captured 14 exploitation attempts from 3 distinct source IPs; the most recent was on 2026-11-10. It is also in the CISA KEV catalogue.

Can CVE-2023-27350 be detected on the network?

Yes. huntback carries a network signature for CVE-2023-27350, so attempts against a decoy are tagged in real time.

How huntback helps

Deploy a decoy that emulates Papercut Mf and you will see every attempt at this CVE the moment it lands, with the full payload, the attacker's infrastructure, and any stage-2 loader. Then huntback can scan the attacker back.

CVSS9.8 Critical

EPSS1.00 (99% pct)

In CISA KEVyes

Published2023-04-20

Updated2026-06-17

Network detectableyes, signatured

Public exploitExploitDB, Metasploit

NVD record → Browse all CVEs → Live malware and C2 finds → Novel-attack discovery → Deploy a decoy →

API

This record, with its evidence timeline, as JSON:

curl -H "X-API-Key: $HUNTBACK_KEY" https://app.huntback.io/api/v1/evidence/CVE-2023-27350

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