Security Digest · Vulnerability record · Known exploited
CVE-2023-2533: PaperCut NG/MF Cross-Site Request Forgery (CSRF) Vulnerability
Exploited in the wild (CISA KEV). 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.
CISA KEV · added 2025-07-28 CVSS 8.4 High EPSS 28.6% · p98
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run PaperCut NG/MF. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-07-28, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-08-18; treat that as the outer limit, not the target.
- EPSS 28.6%, percentile 98: FIRST’s model estimates a 28.6% chance of exploitation activity in the next 30 days, higher than 98% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs an account (high (admin)). Exposure depends on who can log in.
What it is
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.
CISA’s summary
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.
Weakness type: CWE-352.
Product: PaperCut NG/MF · Assigned by: Fluid Attacks · Published: 2023-06-20
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| PaperCut | PaperCut NG/MF | 22.0.10 < 2.1.1 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| Fluid Attacks | 3.1 | 8.4 High | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: high (admin)
- User interaction: required (a user must click/open something)
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2025-07-28; federal due date 2025-08-18. Known ransomware use: Unknown.
- CISA 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.
- CISA SSVC assessment: exploitation active, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 28.62% probability of exploitation activity in the next 30 days; percentile 98.
Timeline
- — CVE record published by Fluid Attacks
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (papercut.com) papercut.com
Vulnerability records
- CVE.org record CVE-2023-2533 cve.org
- NVD entry CVE-2023-2533 nvd.nist.gov
Government
Other references from the CVE record and advisory
- fluidattacks.com fluidattacks.com
All exploited PaperCut vulnerabilities · Today’s Security Digest