Security Vulnerability CVE-2023-38831 - Complete Analysis and Details
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CVE-2023-38831

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This is a free service offered by Red Hot Cyber to the community. It allows you to view, on a single page, information about a single CVE from the National Vulnerability Database (NVD) and the National Institute of Standards and Technology (NIST) of the United States of America, the Forum of Incident Response and Security Teams (FIRST) regarding the EPSS score and percentile, data from the KEV catalog of the Cybersecurity and Infrastructure Security Agency (CISA), as well as selected resources from Red Hot Cyber and other international sources.

National Vulnerability Database Information

Description: RARLAB WinRAR before 6.23 allows attackers to execute arbitrary code when a user attempts to view a benign file within a ZIP archive. The issue occurs because a ZIP archive may include a benign file (such as an ordinary .JPG file) and also a folder that has the same name as the benign file, and the contents of the folder (which may include executable content) are processed during an attempt to access only the benign file. This was exploited in the wild in April through October 2023.

CVSS Base Score: 7.8 (v3.1)

The **CVSS Base Score** is a score from **0 to 10** that represents the intrinsic severity of a vulnerability. A higher score indicates greater severity.

Value
0.02.55.07.510.0
Published on: 08/23/2023 17:15:43
Last modified: 10/31/2025 14:39:33
NIST: CVE source from the National Vulnerability Database (NVD)

CVSS Metrics Details

  • Base Severity: HIGH
  • Vector String: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • Attack Vector: LOCAL
  • Attack Complexity: LOW
  • Privileges Required: NONE
  • User Interaction: REQUIRED
  • Scope: UNCHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: HIGH

Common Weakness Enumeration (CWE)

Database CWE: v4.18

CWE-345: Insufficient Verification of Data Authenticity ↗

The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

CWE-351: Insufficient Type Distinction ↗

The product does not properly distinguish between different types of elements in a way that leads to insecure behavior.

Fonte: MITRE CWE


FIRST Information

EPSS Score: 0.9359

The **EPSS (Exploit Prediction Scoring System)** is a score from **0 to 1** that indicates the **probability** that a vulnerability will be exploited in the real world in the next 30 days. A higher value indicates a greater likelihood of exploitation.

Value
0.00.250.50.751.0

Percentile: 0.9983

The **Percentile** indicates how much higher this vulnerability's EPSS score is compared to all other vulnerabilities in the EPSS database. For example, a percentile of 0.90 (90%) means that 90% of vulnerabilities have an EPSS score equal to or lower than the current one.

Value
0.00.250.50.751.0

*Data updated as of: 2025-12-11


CISA Information (Known Exploited Vulnerabilities)

The **CISA KEV Catalog** lists vulnerabilities that have been **actively exploited in the real world**. If a CVE is present in this catalog, it indicates that the threat is immediate and mitigation should be a top priority.

CVE **CVE-2023-38831** **IS PRESENT** in the CISA KEV Catalog!

  • Vulnerability Name: RARLAB WinRAR Code Execution Vulnerability
  • Short Description: RARLAB WinRAR contains an unspecified vulnerability that allows an attacker to execute code when a user attempts to view a benign file within a ZIP archive.
  • Date Added to KEV: 08/24/2023
  • Vendor/Product: RARLAB / WinRAR
  • Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  • Due Date: 09/14/2023

Articles published on Red Hot Cyber


NVD References

Exploit PoC from GitHub