CVE-2025-8343

MediumPublic PoC

Published: 31 July 2025

Published

31 July 2025

Modified

29 April 2026

KEV Added

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Patch

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CVSS Score 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Score 0.0022 44.7th percentile

Risk Priority 9 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-8343 is a medium-severity Path Traversal (CWE-22) vulnerability in Viglet Shio. Its CVSS base score is 4.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 44.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique.

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-10 Information Input Validation

addresses: CWE-22

Validates pathnames and filenames to prevent traversal outside intended directories.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1005 Data from Local System Collection

Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.

attack.mitre.org →

Why these techniques?

Path traversal in remote web API enables exploitation of public-facing app (T1190) for unauthorized local file reads (T1005).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

NVD Description

A vulnerability was found in openviglet shio up to 0.3.8. It has been rated as critical. This issue affects the function shStaticFilePreUpload of the file shio-app/src/main/java/com/viglet/shio/api/staticfile/ShStaticFileAPI.java. The manipulation of the argument fileName leads to path traversal. The attack may be…

initiated remotely. The exploit has been disclosed to the public and may be used.

Deeper analysisAI

CVE-2025-8343 is a path traversal vulnerability (CWE-22) in openviglet shio versions up to 0.3.8. The issue resides in the shStaticFilePreUpload function within the file shio-app/src/main/java/com/viglet/shio/api/staticfile/ShStaticFileAPI.java, where manipulation of the fileName argument allows attackers to traverse directories. Although described as critical in some sources, the CVSS v3.1 base score is 4.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N), indicating medium severity with low confidentiality impact.

The vulnerability can be exploited remotely by authenticated users with low privileges (PR:L). Attackers can send crafted requests to the affected endpoint, leveraging the fileName parameter to access files outside the intended directory, potentially reading sensitive configuration or data files. No integrity or availability impacts are associated, and the exploit has been publicly disclosed, increasing the risk of immediate use.

Advisories and discussions are tracked in GitHub issues at https://github.com/openviglet/shio/issues/1028 and https://github.com/openviglet/shio/issues/1028#issue-3239418750, with additional details on VulDB at https://vuldb.com/?ctiid.318293, https://vuldb.com/?id.318293, and https://vuldb.com/?submit.617679. No specific patch or mitigation steps are detailed in the provided information, so practitioners should monitor these sources for updates and consider restricting access to the static file API endpoint.