CVE•Published 2023-04-20•Modified 2026-10-01•2 articles on news•5 live references•NVD data

CVE-2023-27351Papercut · Papercut_mf

Vulnerability data via NVD (ingested)

CVSS v3.1

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS percentile

100

Exploit Prediction Scoring System · top 0% of all CVEs

Weaknesses (CWE)

CWE-287Improper Authentication

Description

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.

Timeline

Published 2023-04-20

Modified 2026-10-01

External references

NVD MITRE Exploit-DB trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2023-27351

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Papercut Papercut Mf"

All exposed Papercut Papercut Mf instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Papercut Mf"

HTTP body or banner mentions "Papercut Mf" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2023-27351