CVE-2026-39604
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 zookatron MyBookTable Bookstore mybooktable allows Stored XSS.This issue affects MyBookTable Bookstore: from n/a through <= 3.6.0.
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 confidenceThis is a stored Cross-site Scripting (XSS) vulnerability in the MyBookTable Bookstore plugin. The plugin fails to properly sanitize user-supplied input before storing it, allowing malicious JavaScript code to be persisted in the database. When other users view the affected content, the injected script executes in their browsers, potentially stealing session cookies or performing actions on behalf of the victim.
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.
-
Confirm MyBookTable Bookstore plugin is installedNavigate to WordPress admin > Plugins and locate MyBookTable Bookstore in the list of installed pluginsAffected if The plugin is installed and active in WordPress
-
Identify installed plugin versionIn the plugins list, look for the version number displayed under the plugin name, or check the plugin header in the main PHP file (wp-content/plugins/mybooktable-bookstore/)Affected if The version is older than the patched version (if known) or cannot be determined
-
Locate user input fieldsAccess the plugin book management interface (usually under Books or MyBookTable menu) and identify fields that accept user input such as book title, author name, description, or custom metadataAffected if The plugin accepts user input in book metadata or description fields
-
Inspect HTML output for encodingAdd a test book with a harmless HTML tag like <script>test</script> in a text field, then view the frontend page and view the page source to see if the tags are rendered as plain text or executedAffected if The HTML tags appear unescaped in the page source (e.g., <script> instead of <script>)
-
Search for existing malicious payloadsQuery the database for stored XSS patterns: SELECT * FROM wp_posts WHERE post_content LIKE '%<script%' OR post_content LIKE '%onload=%' (adjust table prefix if different)Affected if Suspicious script tags or event handlers are found stored in the database
You are affected if MyBookTable Bookstore plugin is installed and user-supplied content is rendered without HTML encoding in the frontend.
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 dataImplement proper input validation and output encoding for all user-supplied data. Use WordPress sanitization functions (such as sanitize_text_field, esc_html, esc_attr) when storing and displaying user input. Consider adding Content Security Policy headers as defense-in-depth.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-39604 — 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-2026-39604 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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
- No spam, self-promotion, credentials, or personal data