CVE-2023-2533: PaperCut NG/MF Cross-Site Request Forgery (CSRF) Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , 769 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 28.8%
EPSS score, percentile 98.1 of all scored records
- How severe?
- 8.4 High
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA deadline . Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- from 22.0.10 to before 2.1.1
Unaffected 21.2.12; 20.1.8
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
What to do
Required action, set by CISA
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date for this action: .
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://www.papercut.com/kb/Main/SecurityBulletinJune2023
- https://nvd.nist.gov/vuln/detail/CVE-2023-2533
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | from 22.0.10 to before 2.1.1 |
| Unaffected | 21.2.12 |
| Unaffected | 20.1.8 |
Versions not listed are: unaffected.
Versions the record lists as unaffected: 21.2.12, 20.1.8.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
About this vulnerability
PaperCut NG/MF contains a cross-site request forgery (CSRF) vulnerability, which, under specific conditions, could potentially enable an attacker to alter security settings or execute arbitrary code.
Summary: CISA's KEV catalog, as of .
- CISA added CVE-2023-2533 to its Known Exploited Vulnerabilities (KEV) catalog on 28 Jul 2025.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 18 Aug 2025.
- The CVE record was published on 20 Jun 2023, 769 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 8.4 (High), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 28.8% (percentile 98.1), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of . About the data.
Description
PaperCut MF/NG 22.0.10 (Build 65996 2023-03-27) - Remote code execution via CSRF
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.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
Weakness
- CWE-352: Cross-Site Request Forgery (CSRF)
Attack patterns (CAPEC)
- CAPEC-62: Cross Site Request Forgery
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| Added to CISA KEV | |
| CISA due date for the required action | |
| CVE record last updated |
References
More exploited PaperCut vulnerabilities
- CVE-2026-81578: PaperCut NG/MF Missing Authentication for Critical Function Vulnerability
- CVE-2026-82078: PaperCut NG/MF Unsafe Reflection Vulnerability
- CVE-2023-27351: PaperCut NG/MF Improper Authentication Vulnerability
- CVE-2023-27350: PaperCut MF/NG Improper Access Control Vulnerability