Security readout for executives and security teams
Plain-English summary
CVE-2023-3375 affects Unisign Bookreen before 3.0.0. A highly privileged user could upload a dangerous file type that leads to operating system command injection. Successful exploitation could compromise confidentiality, integrity, and availability of the Bookreen host.
Executive priority
Treat as high priority for any Bookreen environment before 3.0.0. The business concern is potential server takeover by a privileged account, so prioritize inventory, version confirmation, and upgrade planning.
Technical view
The CVE describes CWE-434 unrestricted upload of dangerous file type in Bookreen before 3.0.0, allowing OS command injection. CVSS 3.1 is 7.2: network attack vector, low complexity, high privileges required, no user interaction, and high C/I/A impact.
Likely exposure
Exposure is limited to organizations running Unisign Bookreen versions before 3.0.0, especially where upload functionality is reachable by privileged users. The source data does not identify specific deployments, default configurations, or internet-exposed endpoints.
Exploitation context
The CVE is not listed as CISA KEV in the provided bundle, and no cited source states active exploitation. Risk remains material because the impact is full host compromise, but exploitation requires high privileges.
Researcher notes
Evidence is sparse. The record confirms dangerous file upload leading to OS command injection, but does not provide endpoint details, proof of concept status, or observed exploitation. Avoid assuming exposure without confirming Bookreen version and access paths.
Mitigation direction
- Inventory Bookreen deployments and confirm whether any version is before 3.0.0.
- Update affected Bookreen instances to 3.0.0 or later where vendor guidance confirms applicability.
- Restrict privileged access to Bookreen upload functions to necessary administrators only.
- Review vendor or national CERT guidance before applying operational workarounds.
- Monitor Bookreen hosts for suspicious uploads or unexpected process execution.
Validation and detection
- Confirm installed Bookreen version from trusted asset or application records.
- Identify which users can access file upload functionality.
- Review application and host logs for unusual uploaded files or command execution indicators.
- Verify compensating access controls around privileged Bookreen administration paths.
- Track remediation evidence for every Bookreen instance found.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-3375 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9TR-CERTVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.usom.gov.tr/bildirim/tr-23-0489CVE reference, TR-CERT · government-resource, broken-link
- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-23-0489CVE reference, TR-CERT · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.