dbcve.org
Thumbnail Carousel SliderWordPress extension · I13websolution

CVE-2023-5821

MEDIUM · 6.5 CVSS v3.1 Published 2023-10-27
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
72/100
Remediation priority · Elevated
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
The Thumbnail carousel slider plugin for WordPress is vulnerable to Cross-Site Request Forgery in version 1.0. This is due to missing nonce validation on the deleteselected function. This makes it possible for unauthenticated attackers to delete sliders in bulk via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

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 · high confidence

The Thumbnail carousel slider plugin for WordPress v1.0 is vulnerable to Cross-Site Request Forgery due to missing nonce validation on the deleteselected function. This allows unauthenticated attackers to forge requests that can bulk-delete sliders by tricking authenticated administrators into clicking malicious links.

MitigationAdd nonce verification to the deleteselected function and implement proper capability checks for all state-changing operations in the plugin.

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
Thumbnail Carousel SliderWordPress extension
Affected:= 1.0

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
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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 checks

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

  1. Confirm plugin installation
    Check if the I13websolution Thumbnail Carousel Slider plugin is installed in the WordPress plugins directory (wp-content/plugins/). Look for a folder containing 'thumbnail-carousel-slider' or similar naming.
    Affected if The plugin folder exists in the WordPress installation's plugins directory.
  2. Identify the installed version
    Open the main plugin file (typically index.php or the plugin's main PHP file) and locate the plugin header comment containing 'Version:' to determine the exact version number.
    Affected if The installed version is 1.0.
  3. Locate the deleteselected function
    Search the plugin source code for the function named 'deleteselected' or 'deleteselected' action handler that handles bulk-delete operations for sliders.
    Affected if The deleteselected function exists in the plugin code.
  4. Check for nonce validation in deleteselected
    Examine the deleteselected function code for the presence of nonce verification functions such as wp_nonce_field, check_ajax_referer, wp_verify_nonce, or check_admin_referer.
    Affected if The deleteselected function lacks nonce validation (none of the nonce verification functions are present in the function or its immediate calling context).

A user is affected if the I13websolution Thumbnail Carousel Slider plugin version 1.0 is installed and the deleteselected function lacks nonce validation, allowing CSRF attacks to bulk-delete sliders via forged requests.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Add nonce verification to the deleteselected function and implement proper capability checks for all state-changing operations in the plugin.

Recommended fix Moderate confidence

Latest available version on wordpress.org (check for version > 1.0 with security fix)

  1. Log in to the WordPress admin dashboard
  2. Navigate to Plugins > Installed Plugins
  3. Locate 'Thumbnail Carousel Slider' in the plugin list
  4. If an update is available, click 'Update Now' to install the latest patched version
  5. If no update appears, deactivate and delete the plugin until a patched version is available
  6. Verify the slider functionality works correctly after updating

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Thumbnail Carousel Slider Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2023-5821 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2023-5821 in production — separate from our analysis above.

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.

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