CVE-2023-3375Network attack vector

Authenticated OS command execution via dangerous file upload

Published Sep 5, 2023 · Updated May 22, 2026

Unrestricted file upload in Bookreen before 3.0.0 allows remote authenticated users to execute OS commands via dangerous files. The public advisory identifies a dangerous-file upload but does not disclose the affected endpoint, accepted file types, or how the file reaches command execution. Network access with high application privileges is required, and successful exploitation permits command execution affecting application data and service operation.

CVSS severity7.2
High
EPSS probability1.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Bookreen before 3.0.0 allows remote authenticated users to execute OS commands via dangerous files. The public advisory identifies a dangerous-file upload but does not disclose the affected endpoint, accepted file types, or how the file reaches command execution. Network access with high application privileges is required, and successful exploitation permits command execution affecting application data and service operation.

The record

CVE
CVE-2023-3375
Published
Sep 5, 2023
Updated
May 22, 2026
Vendor
Bookreen
Product
Bookreen
Classifications
CWE-434, CAPEC-88, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 5, 2023CVE publishedPublication date reported by the CVE source.
  2. May 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Bookreen · Bookreenversion=0 <3.0.0

Published CVSS scores

7.2TR-CERTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-88OS Command Injection
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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