CVE-2025-8344
Published: 31 July 2025
Summary
CVE-2025-8344 is a medium-severity Improper Access Control (CWE-284) vulnerability in Viglet Shio. Its CVSS base score is 6.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 28.3th 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
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.
This control enforces ownership-based restrictions on portable storage device use, directly implementing access control over media insertion into organizational systems.
Hardware write-protect enforces access control on critical resources (e.g., firmware) independent of software state.
The access control policy and procedures directly mandate and enforce proper access control mechanisms across the organization.
Device lock enforces restricted access until re-authentication, directly reducing unauthorized use of active sessions.
Supervision and review of access control activities directly detects and remediates improper access configurations or usages.
Explicitly identifying and documenting actions permitted without identification or authentication enforces proper access control boundaries by defining justified exceptions.
By automatically labeling outputs with security attributes, the control supports attribute-based enforcement and reduces exploitability of improper access control weaknesses.
Associating and retaining security attributes with data directly supports enforcement of access control decisions across storage, processing, and transmission.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unrestricted file upload (CWE-434) in a public-facing web app directly enables remote exploitation (T1190) and deployment of web shells (T1100) via malicious filename manipulation.
NVD Description
A vulnerability classified as critical has been found in openviglet shio up to 0.3.8. Affected is the function shStaticFileUpload of the file shio-app/src/main/java/com/viglet/shio/api/staticfile/ShStaticFileAPI.java. The manipulation of the argument filename leads to unrestricted upload. It is possible to launch the attack…
more
remotely. The exploit has been disclosed to the public and may be used.
Deeper analysisAI
CVE-2025-8344 is a critical vulnerability in openviglet shio versions up to 0.3.8, affecting the shStaticFileUpload function in the file shio-app/src/main/java/com/viglet/shio/api/staticfile/ShStaticFileAPI.java. The issue arises from manipulation of the filename argument, enabling unrestricted file upload. It is remotely exploitable and has been assigned a CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L), with associated CWEs CWE-284 (Improper Access Control) and CWE-434 (Unrestricted Upload of File with Dangerous Type). The vulnerability was published on 2025-07-31.
An attacker with low-privilege remote access (PR:L) can exploit this vulnerability without user interaction by manipulating the filename parameter during file upload operations. Successful exploitation allows limited impact across confidentiality, integrity, and availability (C:L/I:L/A:L), potentially enabling the upload of malicious files that could lead to further compromise depending on server configuration and application context.
Advisories and details are documented in GitHub issues at https://github.com/openviglet/shio/issues/1029 and https://github.com/openviglet/shio/issues/1029#issue-3239422554, as well as VulDB entries at https://vuldb.com/?ctiid.318294, https://vuldb.com/?id.318294, and https://vuldb.com/?submit.617680. The exploit has been publicly disclosed and may be used by attackers.
Details
- CWE(s)