CVE-2026-39638
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 Themeum Qubely qubely allows Stored XSS.This issue affects Qubely: from n/a through <= 1.8.14.
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 Cross-site Scripting (XSS) vulnerability in Themeum Qubely WordPress plugin allows authenticated attackers to inject malicious JavaScript code through plugin settings or content fields that are not properly sanitized before being stored and rendered in web pages.
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
- High
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:H/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 Qubely plugin is installedNavigate to WordPress admin dashboard > Plugins > Installed Plugins and locate 'Themeum Qubely' or 'Qubely' in the list. Note whether the plugin is active or inactive.Affected if The plugin is installed and active in WordPress
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Identify installed Qubely versionIn the Plugins list, click on the Qubely plugin to view its details, or check the plugin files in wp-content/plugins/qubely/ for a version indicator in the main PHP file header comments.Affected if The installed version matches or falls within the affected version range (compare to the version reported as vulnerable)
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Identify vulnerable input fieldReview Qubely plugin settings and block editor components that accept user input, particularly any fields that save content to the database (e.g., text inputs, custom block fields, widget settings).Affected if Unsantized user input fields exist in Qubely that allow storing content directly to the WordPress database
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Check database for suspicious stored contentQuery the WordPress database (wp_posts, wp_postmeta tables) for any entries containing script tags, javascript:, or other XSS payloads that may have been injected via Qubely. Use: SELECT * FROM wp_posts WHERE post_content LIKE '%<script%' OR post_content LIKE '%javascript:%';Affected if Malicious scripts or XSS payloads are found stored in the database associated with Qubely-created content
A user is affected if the Qubely plugin is installed and the installed version is within the affected range, or if suspicious XSS payloads are found stored in the database from Qubely input fields.
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 Qubely to the latest version which should include proper input sanitization using WordPress functions like esc_html(), esc_attr(), or wp_kses() on all user-supplied data before storage and output.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-39638 — 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-2026-39638 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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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.
- 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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