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Deserialization of Untrusted DataWeakness · CWE-502

CVE-2024-1951

HIGH · 7.5 CVSS v3.1 Published 2024-03-13
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
81/100
Remediation priority · High
Remotely reachable Zero-click

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 Logo Showcase Ultimate – Logo Carousel, Logo Slider & Logo Grid plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.3.8 via deserialization via shortcode of untrusted input. This makes it possible for authenticated attackers, with contributor access and above, to inject a PHP Object. No POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

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 Logo Showcase Ultimate WordPress plugin up to version 1.3.8 is vulnerable to PHP Object Injection through insecure deserialization of untrusted input in its shortcode handler. Authenticated attackers with contributor-level access or higher can inject arbitrary PHP objects via the plugin's shortcode. While no POP chain exists within the plugin itself, the presence of a POP chain in other plugins or themes on the target system could enable arbitrary file deletion, data exfiltration, or remote code execution.

MitigationUpdate the plugin to version 1.3.9 or later. Until patched, limit or audit contributor-level user permissions, and review installed plugins/themes for potential POP chains that could be chained with this vulnerability.

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
High
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

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. Verify Logo Showcase Ultimate plugin installation and version
    In WordPress admin, go to Plugins > Installed Plugins and look for 'Logo Showcase Ultimate' or check the plugin files for the version in the main PHP file header. Alternatively, use WP-CLI: wp plugin list --name='logo-showcase-ultimate'
    Affected if The plugin is installed at version 1.3.8 or lower (versions before 1.3.9)
  2. Identify shortcode usage
    Search post/page content for the plugin shortcode, typically [logo_showcase] or similar variants. Check theme files for do_shortcode() calls with the plugin shortcode.
    Affected if The shortcode handler is actively processing user-controlled content
  3. Review user roles with contributor-level access
    In WordPress admin, go to Users > All Users and examine the role column. Contributor and higher roles (Author, Editor, Admin) can exploit this flaw. Use WP-CLI: wp user list --role=contributor --format=count
    Affected if Any authenticated user with contributor-level access or higher exists on the site
  4. Audit installed plugins and themes for POP chain potential
    Review all active plugins and the active theme for known PHP Object Injection vulnerabilities or deserialization sinks that could be chained with CVE-2024-1951. Check for plugins with known deserialization issues or custom unserialize() calls.
    Affected if Other vulnerable plugins/themes with exploitable POP chains are present alongside this plugin

Your site is affected if Logo Showcase Ultimate version 1.3.8 or lower is installed and either the shortcode is in use or contributor-level users exist, especially if other plugins with POP chains are present.

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

Update the plugin to version 1.3.9 or later. Until patched, limit or audit contributor-level user permissions, and review installed plugins/themes for potential POP chains that could be chained with this vulnerability.

Recommended fix High confidence

Version 1.3.9 or later

  1. Navigate to the WordPress admin dashboard
  2. Go to Plugins > Installed Plugins
  3. Find 'Logo Showcase Ultimate – Logo Carousel, Logo Slider & Logo Grid'
  4. If the plugin shows a newer version available, click 'Update Now'
  5. Alternatively, download version 1.3.9 or later from the WordPress plugin repository and upload/install it manually
  6. After updating, verify the plugin is running version 1.3.9 or higher

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

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,980
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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-2024-1951 in production — separate from our analysis above.

No notes yet

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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