How should we interpret CVSS severity scores?

CVSS estimates technical severity, but it does not automatically equal business risk. Prioritize using context like internet exposure, asset criticality, known exploitation, and whether compensating controls exist. A Medium CVSS on an exposed production system can be more urgent than a Critical on an isolated non-production host.

Vulnerability Database

Q: What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

Q: What's the difference between a vulnerability, an exploit, and a zero-day?

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. Risk increases sharply when exploitation becomes reliable or widespread.

Q: Why do vulnerabilities keep reappearing in our environment?

Recurring findings usually come from incomplete asset discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host.

Q: How do we prioritize remediation without burning out the team?

Use a repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress so remediation is steady, not reactive.

Q: How can SynScan help reduce vulnerability risk over time?

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.

361,925

Total vulnerabilities in the database

CVE-2026-54065 — nukeviet / nukeviet

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Summary

Path Traversal to Arbitrary File Deletion in the Edit Comment admin function. An authenticated administrator can delete arbitrary files within the application root (e.g., config.php) by injecting a crafted attach parameter, rendering the application inoperable.

Affected Component

modules/comment/admin/edit.php

Root Cause

In the vulnerable version, the attach parameter received via HTTP POST was not validated before being processed:

// Vulnerable code (before fix)
$attach = $nv_Request-&gt;get_string(&#039;attach&#039;, &#039;post&#039;, &#039;&#039;, true);
if (!empty($attach)) {
    $attach = substr($attach, strlen(NV_BASE_SITEURL . NV_UPLOADS_DIR . &#039;/&#039; . $module_upload . &#039;/&#039;));
}

substr() strips the first N characters (equal to the length of the upload URL prefix, e.g. 26 chars for /nukeviet/uploads/comment/). By padding the payload with exactly 26 arbitrary characters followed by a path traversal sequence, an attacker can store ../../<target> directly into the database.

When the comment is subsequently deleted, del.php reads attach from the database and calls:

nv_deletefile(NV_UPLOADS_REAL_DIR . &#039;/&#039; . $module_upload . &#039;/&#039; . $row[&#039;attach&#039;]);

nv_deletefile() resolves the path via realpath() and only verifies the result is within NV_ROOTDIR — it does not restrict deletion to the uploads directory — allowing deletion of any file in the installation root.

Steps to Reproduce

Log in as an administrator and navigate to Admin → Comment Management.
Select any comment and open the Edit form.
Intercept the POST request and set the attach parameter to:

aaaaaaaaaaaaaaaaaaaaaaaaaa../../config.php

(26 padding characters + traversal path)

Submit the request. The value ../../config.php is now stored in the database.
Delete the comment. config.php is deleted from the application root.
The application immediately redirects to the install wizard, confirming the file has been removed.

Impact

Any file readable by the web server process within NV_ROOTDIR can be permanently deleted.
Deleting config.php causes a full application outage and exposes the install wizard.

Severity

CVSS v3.1 Base Score: 8.7 (High)

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

| Metric | Value | |--------|-------| | Attack Vector | Network | | Attack Complexity | Low | | Privileges Required | High (Admin required) | | User Interaction | None | | Scope | Changed | | Confidentiality | None | | Integrity | High | | Availability | High |

Fix

Added nv_is_file() validation before processing the attach value. This function uses realpath() and a regex check to ensure the file resolves to a path within the intended upload directory, rejecting any traversal attempts.

// Fixed code
$attach = $nv_Request-&gt;get_string(&#039;attach&#039;, &#039;post&#039;, &#039;&#039;);
if (!empty($attach) and nv_is_file($attach, NV_UPLOADS_DIR . &#039;/&#039; . $module_upload)) {
    $attach = substr($attach, strlen(NV_BASE_SITEURL . NV_UPLOADS_DIR . &#039;/&#039; . $module_upload . &#039;/&#039;));
} else {
    $attach = &#039;&#039;;
}

Published: Jul 13, 2026
Updated: Jul 14, 2026
CVE: CVE-2026-54065
GHSA: GHSA-c9xg-64p9-f2jj
Severity: High
Exploit:
CISA KEV:

CVSS v3:

Severity: High
Score: 8.7
AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

CWEs:

CWE-22

OWASP TOP 10:

A5 - Broken Access Control

Affected Software
References

Software	From	Fixed in
nukeviet / nukeviet	-	4.6.00

https://github.com/nukeviet/nukeviet/security/advisories/GHSA-c9xg-64p9-f2jj

Deep Security Visibility Without the Complexity

SynScan provides clear, real-time security insights so you can monitor your attack surface, spot risks early, and act fast—without extra complexity.

No setup fees
5-min deployment
Cancel anytime

Book a Demo

Frequently Asked Questions

What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.