Answer in brief
CVE-2023-27351 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps PaperCut/NG (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps PaperCut/NG (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| PaperCut/NGgeneric | 22.0.5 (Build 63914) | Not reported |
Published upstream
Apr 20, 2023
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
May 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Apr 20, 2026
Evidence: source:kev:kev:kev:recordThis vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SecurityRequestFilter class. The issue results from improper implementation of the authentication algorithm. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-19226.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2023-27351 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps PaperCut/NG (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps PaperCut/NG (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| PaperCut/NGgeneric | 22.0.5 (Build 63914) | Not reported |
Published upstream
Apr 20, 2023
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
May 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Apr 20, 2026
Evidence: source:kev:kev:kev:recordThis vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SecurityRequestFilter class. The issue results from improper implementation of the authentication algorithm. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-19226.
Quoted source text, attributed separately from HOL analysis.