CVE-2023-27350KEV · OVERDUECWE-284

PaperCut MF/NG Improper Access Control Vulnerability

Critical · published April 20, 2023

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 100.0th percentile for exploit probability.

1262
days past CISA
deadline
CVSS v3.0
9.8
EPSS
100%
Percentile
100.0
In the wild
Confirmed
What it is

🚨 A total authentication bypass is on the line! This vulnerability in PaperCut NG 22.0.5 allows attackers to waltz right in and execute arbitrary code without breaking a sweat. 🔥 Think of it like a hotel receptionist who hands out room keys without checking IDs — anyone could enter and access all the rooms, including the penthouse suite! The consequences are absolutely devastating: an attacker could exploit this flaw to gain SYSTEM-level access, manipulate settings, exfiltrate sensitive data, or even bring the entire system to its knees. This is a golden ticket for anyone looking to wreak havoc without needing any credentials!

Put simply

Think of it like a hotel receptionist who hands out room keys without checking IDs — anyone could enter and access all the rooms, including the penthouse suite! This flaw lies within the SetupCompleted class due to improper access control, allowing remote attackers to bypass authentication and execute arbitrary code at a critical level.

What to do

The consequences are absolutely devastating: an attacker could exploit this flaw to gain SYSTEM-level access, manipulate settings, exfiltrate sensitive data, or even bring the entire system to its knees. This is a golden ticket for anyone looking to wreak havoc without needing any credentials! Immediate action is required! Patch your installations to version 22.0.6 or newer, and review your overall security settings to ensure no doors are left wide open. It's crucial to audit your PaperCut NG instances to prevent unauthorized access. You've got this! By taking swift action, you'll close the gaps and secure your system in no time. 🛡️

The record
Technical detail
CVSS v3.0
9.8 · CRITICAL
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.99999 · 100.0th percentile
Weakness
CWE-284 · Improper Access Control
Published
2023-04-20T00:00Z
KEV added
2023-04-21 · due 2023-05-12
EPSS history
Timeline
  • 21 APR 00:00Z
    Added to CISA KEV — remediate by May 12
    kev
  • 20 APR 00:00Z
    This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914)
    cvelistv5