Threats / PaperCut / CVE-2023-2533
CVE-2023-2533
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
PaperCut NG/MF vulnerability
PaperCut NG/MF is vulnerable to cross-site request forgery (CSRF) that could allow attackers to alter security settings or execute arbitrary code under specific conditions.
Verdict
Today item — known-exploited.
A CSRF vulnerability in PaperCut NG/MF enables attackers to perform unauthorized actions by tricking authenticated users into visiting malicious pages, potentially compromising system security and integrity.
CISA KEV Yes · 2025-07-285EPSS 0.29246 (verify live)6Exploit Public PoC7CVSS 8.43CISA SSVC Exploitation: active · Automatable: no · Impact: total4
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
5 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-07-28).
Probability (EPSS)
EPSS 0.29246 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 8.4 (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H) · Affected: PaperCut, NG/MF. Confirm exact fixed builds in the vendor advisory.CVSS — CNA-assigned (CVE.org), version 3.1, set at disclosure.
Weakness (CWE)
Mapped to CWE-352 Cross-Site Request Forgery (CSRF) — weakness family: Web / client.CWE — CNA-assigned (CVE.org); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: no · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 769 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious webpage or email containing a forged request targeting a PaperCut administrator's browser session.
Business
An attacker gains the ability to modify critical security configurations without direct system access, increasing breach risk.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I exploit the CSRF flaw to execute arbitrary code on the PaperCut server by leveraging the victim's authenticated session.
Business
The organization faces potential system compromise, data theft, or operational disruption through code execution at system privilege level.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05
Coverage & confidence
— what we know, and what we don’tEstablished (cited)
Coverage gaps — stated, not hidden
Disclosure & credit2
Catalogued by Fluid AttacksCNA
Credited with finding itNo finder named in the public CVE record — the work behind this find is unattributed.