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Exploited vulnerability · CISA KEV

Is CVE-2023-2533 exploited? Yes: in CISA KEV since 28 Jul 2025

Gociux · PaperCut NG/MF · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2023-2533, PaperCut NG/MF Cross-Site Request Forgery (CSRF) Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 28 Jul 2025, 769 days after it was published. It affects PaperCut NG/MF. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 28 Jul 2025
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity8.4CVSS 3.1 · high
US federal due18 Aug 2025BOD 22-01 deadline

What it is

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.

VendorPaperCut (5 exploited CVEs in KEV)
ProductNG/MF
VulnerabilityPaperCut NG/MF Cross-Site Request Forgery (CSRF) Vulnerability
WeaknessCWE-352
Published20 Jun 2023
Added to KEV28 Jul 2025
Reported by (CNA)Fluid Attacks

What to do

  1. Check whether you run it. Look for NG/MF in your asset inventory, including appliances and cloud images. Stack check lists every exploited PaperCut CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 20 Jun 2023.
  4. Get told next time. Email alerts when CISA adds a CVE for PaperCut.

Other exploited CVEs in NG/MF

References

Questions

Is CVE-2023-2533 being exploited?

Yes. CISA added CVE-2023-2533 to the Known Exploited Vulnerabilities catalog on 28 Jul 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2023-2533 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2023-2533?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check PaperCut's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected NG/MF and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in July 2025 · PaperCut scorecard · act-now radar.

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