CVE-2023-27351
Act now ● On CISA KEV — actively exploited used in ransomware
Actively exploited — on the CISA KEV list.
CVSS base
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EPSS — probability of exploitation (30 days)
78.1%
99.6th percentile
CISA KEV
Listed
Added 2026-04-20 · patch by 2026-05-04
Weakness / dates
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Published — · modified —
Timeline
- 2026-04-20 — Added to CISA KEV (actively exploited)
- 2026-05-04 — CISA patch-by deadline
Description
PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class.