Widely-used PaperCut NG/MF; unauthenticated access could disrupt IT ops across many orgs.
CVE-2023-27351
PaperCut NG/MF auth bypass allows unauthenticated remote access.
Is CVE-2023-27351 being exploited?
Yes. CVE-2023-27351 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2023-27351?
CVE-2023-27351 is rated High with a CVSS score of 8.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2023-27351?
Yes. A fix has been recorded for CVE-2023-27351. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2023-27351 affect?
CVE-2023-27351 affects PaperCut NG/MF 22.0.5 Build 63914. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2023-27351?
Apply vendor patch or mitigations immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote bypass enables admin/management access and config changes.
Patch when possible
- affected22.0.5 (Build 63914)
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.