Libsyn Publisher HubWordPress extension · Libsyn
CVE-2023-45835
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 · uneditedUnauth. Reflected Cross-Site Scripting (XSS) vulnerability in Libsyn Libsyn Publisher Hub plugin <= 1.4.4 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 confidenceUnauthenticated reflected cross-site scripting (XSS) vulnerability in Libsyn Publisher Hub plugin versions 1.4.4 and below allows attackers to inject malicious JavaScript through unsanitized user input that gets reflected in the HTTP response without proper output encoding.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Libsyn Publisher HubWordPress extension
<= 1.4.4CVSS 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
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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.
-
Verify Libsyn Publisher Hub plugin is installedLog into WordPress admin and navigate to Plugins > Installed Plugins. Look for 'Libsyn Publisher Hub' or 'Libsyn' in the plugin list. Alternatively, check for the plugin directory at /wp-content/plugins/ via file system access.Affected if The plugin is not found in the WordPress installation.
-
Check the installed plugin versionIn WordPress admin, find the Libsyn Publisher Hub entry in Plugins > Installed Plugins and note the version number displayed below the plugin name. If using file access, check the plugin's main PHP file for the 'Version' header in the plugin comment block.Affected if The version is 1.4.4 or lower.
-
Identify if the plugin is active and accessibleIn WordPress admin, confirm the plugin status shows as 'Active'. If the site has a frontend, confirm the plugin's public-facing pages or endpoints are accessible (the vulnerability is unauthenticated, so no login is required to trigger it).Affected if The plugin is active and its endpoints are publicly reachable.
-
Inspect HTTP responses for unsanitized input reflectionUse a browser dev tool or intercepting proxy (Burp, ZAP). Visit the plugin's pages and submit various parameters (search fields, form inputs, query strings). Examine the HTTP response body to see if user-supplied input is reflected verbatim without HTML encoding.Affected if User input appears in the response exactly as entered, without being HTML-escaped (e.g., <script> tags not converted to <script>).
A user is affected if the Libsyn Publisher Hub plugin version is 1.4.4 or lower, the plugin is active and publicly accessible, and user-supplied input is reflected in HTTP responses without proper encoding.
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 the plugin to the latest patched version. If no update is available, implement input validation and output encoding on all user-supplied parameters, and consider deploying Content Security Policy (CSP) headers as a defense-in-depth measure.
Fix this in Libsyn Publisher Hub
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 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 $2,560.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-45835 — 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-2023-45835 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