Authentication Bypass in PaperCut NG by PaperCut Software
CVE-2023-27351

7.5HIGH

Key Information:

Vendor

Papercut

Status
Ng
Vendor
CVE Published:
20 April 2023

Badges

💰 Ransomware👾 Exploit Exists🟣 EPSS 83%🦅 CISA Reported

What is CVE-2023-27351?

A vulnerability exists in PaperCut NG versions 22.0.5 and earlier, allowing remote attackers to bypass authentication without needing to provide valid credentials. This flaw is rooted in the SecurityRequestFilter class and arises from improper implementation of the authentication process. Exploiting this vulnerability enables unauthorized access to the system, putting sensitive information at risk.

CISA has reported CVE-2023-27351

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2023-27351 as being exploited and is known by the CISA as enabling ransomware campaigns.

The CISA's recommendation is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Affected Version(s)

NG 22.0.5 (Build 63914)

References

https://www.papercut.com/kb/Main/PO-1216-and-PO-1219
https://www.zerodayinitiative.com/advisories/ZDI-23-232/

EPSS Score

83% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

CVSS V3.0

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 💰

    Used in Ransomware

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

Credit

Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative
.