CVE-2023-2533 | PaperCut MF/NG 22.0.10 (Build 65996 2023-03-27) - Remote code execution via CSRF

Exp

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in PaperCut NG/MF, which, under specific conditions, could potentially enable an attacker to alter security settings or execute arbitrary code. This could be exploited if the target is an admin with a current login session. Exploiting this would typically involve the possibility of deceiving an admin into clicking a specially crafted malicious link, potentially leading to unauthorized changes.

Published: 2023-06-20 Last update: 2026-02-26 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-2533 is rated Critical Active Threat (92/100): CVSS High severity, with high exploitation likelihood (EPSS 36.32%, 97th percentile). CISA KEV confirms active exploitation (added 2025-07-28) affecting PaperCut / NG/MF. a weakness (CWE-352) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2023-2533

Name: PaperCut NG/MF Cross-Site Request Forgery (CSRF) Vulnerability · CISA KEV detail

Exploit added: 2025-07-28

Action due: 2025-08-18

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Public exploit references (Exploit-DB) for CVE-2023-2533

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-2533

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-24 36.90% 36.32% -0.57%
2 2026-02-18 36.32% 36.90% +0.57%
3 2025-12-31 — 36.32% —

Full EPSS history (24 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-2533

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.4 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.7 6.0 [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2023-2533

Affected software / configurations for CVE-2023-2533

Vendor Product Version Raw CPE
papercut papercut_mf < 20.1.8 cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*
papercut papercut_mf >= 21.0.0, < 21.2.12 cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*
papercut papercut_mf >= 22.0.0, < 22.1.1 cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*
papercut papercut_ng < 20.1.8 cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*
papercut papercut_ng >= 21.0.0, < 21.2.12 cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*
papercut papercut_ng >= 22.0.0, <= 22.1.1 cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*

References for CVE-2023-2533

cvelogic Threat Intelligence