{"cve":"CVE-2023-27351","nvd":{"published":"2023-04-20T16:15:07.723","modified":"2026-10-01T19:17:14.823","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-287"],"references":["https://www.papercut.com/kb/Main/PO-1216-and-PO-1219","https://www.zerodayinitiative.com/advisories/ZDI-23-232/","https://www.papercut.com/kb/Main/PO-1216-and-PO-1219","https://www.zerodayinitiative.com/advisories/ZDI-23-232/","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27351"],"products":["papercut:papercut_mf","papercut:papercut_ng"],"source":"nvd","synced_at":"2026-10-19T21:38:05.473481323+00:00"},"epss":{"cve":"CVE-2023-27351","score":0.78052,"percentile":0.99572,"date":"2026-10-25"},"kev":{"cve":"CVE-2023-27351","date_added":"2026-04-20","due_date":"2026-05-04","vendor":"PaperCut","product":"NG/MF","known_ransomware":true},"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}