CVE-2026-39483
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 · uneditedImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Hidekazu Ishikawa VK All in One Expansion Unit vk-all-in-one-expansion-unit allows Stored XSS.This issue affects VK All in One Expansion Unit: from n/a through <= 9.113.3.
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 confidenceStored XSS vulnerability in VK All in One Expansion Unit WordPress plugin allows authenticated attackers to inject malicious JavaScript through unsanitized input that gets stored and executed when other users view affected web pages. The vulnerability stems from improper neutralization of input during web page generation.
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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/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 checksWork through these to decide whether this CVE applies to you.
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Verify VK All in One Expansion Unit plugin is installedIn WordPress admin, go to Plugins > Installed Plugins and look for 'VK All in One Expansion Unit' in the list, or check the /wp-content/plugins/ directory for the veu-inc-vk-block-patterns folderAffected if The plugin is present on the WordPress site
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Check the installed plugin versionIn WordPress admin, go to Plugins > Installed Plugins, find VK All in One Expansion Unit, and note the version number displayed below the plugin nameAffected if The version is 9.113.3 or lower
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Confirm the plugin is activeIn WordPress admin > Plugins > Installed Plugins, verify that VK All in One Expansion Unit shows as 'Active' rather than 'Inactive'Affected if The plugin is active and accessible to site users
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Identify user input fields within the pluginNavigate to the plugin settings pages in WordPress admin (typically under VK Blocks or plugin options), noting any fields that accept user-supplied text input such as custom CSS fields, widget text areas, or content fieldsAffected if User input fields exist and are accessible without additional authentication beyond standard WordPress user roles
The site is affected if VK All in One Expansion Unit version 9.113.3 or lower is installed and active, with any user-accessible input fields present that could store malicious script content.
Generated from the published advisory. Verify against your own configuration.
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 dataUpdate VK All in One Expansion Unit to the latest version beyond 9.113.3 which should contain the fix. Until patched, restrict administrative access and implement additional output encoding as a compensating control.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-39483 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-39483 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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