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Cross-site Scripting (XSS)Weakness · CWE-79

CVE-2026-39548

HIGH · 7.1 CVSS v3.1 Published 2026-06-17
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
78/100
Remediation priority · High
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Unauthenticated Cross Site Scripting (XSS) in MagOne <= 9.0 versions.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Unauthenticated Cross Site Scripting (XSS) vulnerability in MagOne CMS versions 9.0 and below allows remote attackers to inject malicious scripts without any authentication. The vulnerability stems from insufficient input sanitization or improper output encoding in user-supplied data.

MitigationUpgrade MagOne to the latest patched version. If no patch is available, implement robust input validation and output encoding for all user-supplied data, and consider deploying Content Security Policy (CSP) headers to mitigate XSS execution.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify MagOne CMS installation and version
    Check the software version by examining the CMS admin panel, footer, or version file (commonly found in includes/config.php, VERSION.txt, or the admin dashboard About section)
    Affected if The installed version is 9.0 or below
  2. Verify unauthenticated access is possible
    Confirm the CMS login page or public-facing forms are accessible without authentication by attempting to access the site from a browser without credentials
    Affected if Unauthenticated access to the CMS or its public forms is enabled
  3. Locate user-supplied input points
    Identify all publicly accessible input fields such as search boxes, comment forms, contact forms, or URL parameters that accept user data
    Affected if The application accepts user input without authentication
  4. Test for reflected user input
    Inspect the application's HTTP responses when submitting special characters (< > " ') in input fields to see if the values are reflected back without encoding
    Affected if User input is reflected in the response without proper encoding

If MagOne CMS version 9.0 or below is installed and exposes unauthenticated user input fields, the environment is likely affected by this XSS vulnerability.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade MagOne to the latest patched version. If no patch is available, implement robust input validation and output encoding for all user-supplied data, and consider deploying Content Security Policy (CSP) headers to mitigate XSS execution.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-39548 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data