Skip to main content
ExploitedIn CISA KEVFix available

CVE-2023-2533

Exploitation confirmed. First attested on 2025-07-26 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2023-06-20
  • Fixed in22.1.1 · 21.2.12 · 20.1.8
  • WeaknessCWE-352

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2023-06-2015:15CVE publishedNVD
  2. 2025-07-2603:55Exploitation first reportedCISA-ADP
  3. 2025-07-2603:55SSVC exploitation set to activeCISA-ADP
  4. 2025-07-28Added to the CISA KEV catalogCISA KEV
  5. 2025-07-28Listed as exploited by GCVEGCVE

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-2533?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-2533?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Papercut papercut mf
BranchAffectedFixed in
22.x≥ 22.0.0, < 22.1.122.1.1
21.x≥ 21.0.0, < 21.2.1221.2.12
20.1< 20.1.820.1.8
Papercut papercut ng
BranchAffectedFixed in
21.x≥ 21.0.0, < 21.2.1221.2.12
20.1< 20.1.820.1.8
22.x≥ 22.0.0, ≤ 22.1.1no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As Fluid Attacks, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • PaperCut NG/MFother versions: not affected

    platforms: Windows, Linux, MacOS

    Affected
    • ≥ 22.0.10, < 2.1.1fixed in 2.1.1custom

    Not affected = 21.2.12 · = 20.1.8

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-07-06

Fix

  1. Update Papercut papercut mf to 22.1.1 · 21.2.12 · 20.1.8
  2. CISA’s 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.due 2025-08-18

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2025-07-28
Patch Due Date
2025-08-18
Ransomware Use
Unknown
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.

Sources

  • CISA KEVKEV entry2025-07-28
  • ENISA EUVDexploitation2025-07-282025-07-28
  • GCVEexploitation2025-07-28
  • CISA-ADPSSVC decisionactive2025-07-26
  • OpenCVESSVC decisionactive—
  • CNACVSS 3.18.4known since 2026-10-23
  • NVDCVSS 3.18.8read 2026-10-23
  • CNAweakness (CWE)CWE-352known since 2026-10-23
  • NVDweakness (CWE)CWE-352read 2026-10-23
  • FIRST EPSSEPSS score28.8 %read 2026-11-02
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2023-06-20
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-fhf9-47gc-m9wc

Frequently asked questions

What is CVE-2023-2533?

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.

Is CVE-2023-2533 actively exploited?

Yes. CVE-2023-2533 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2025-08-18.

What is the CVSS score for CVE-2023-2533?

CVE-2023-2533 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, July 2025Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record