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Deserialization of Untrusted DataWeakness · CWE-502

CVE-2024-2501

HIGH · 7.5 CVSS v3.1 Published 2024-04-09
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 Hubbub Lite – Fast, Reliable Social Sharing Buttons plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.33.1 via deserialization of untrusted input via the 'dpsp_maybe_unserialize' function. 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 Hubbub Lite WordPress plugin up to version 1.33.1 contains a PHP Object Injection vulnerability in the 'dpsp_maybe_unserialize' function, which deserializes untrusted input without proper validation. Authenticated attackers with contributor-level access or higher can inject arbitrary PHP objects. While no POP chain exists within the plugin itself, a POP chain from another installed plugin or theme could enable remote code execution.

MitigationUpdate the Hubbub Lite plugin to version 1.34.0 or later. Additionally, audit all other installed plugins and themes for potential POP chains that could be chained with this vulnerability, and limit contributor-level user accounts until the patch is applied.

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 Hubbub Lite plugin is installed
    Log into WordPress admin panel and navigate to Plugins > Installed Plugins, or check the plugin files in wp-content/plugins/hubbub-lite/ for the main PHP file and locate the plugin header stating 'Version: x.x.x'
    Affected if The plugin is installed and active
  2. Check installed version against affected range
    Compare the installed version number found in the plugin header to the affected range: versions 1.33.1 and below are vulnerable, version 1.34.0 and above are fixed
    Affected if Installed version is 1.33.1 or lower (or if version cannot be determined but the plugin is present up to the date of this advisory)
  3. Locate the vulnerable function
    Inspect the plugin source code for the function named 'dpsp_maybe_unserialize' - this function performs unserialize() on untrusted input without validation
    Affected if The function 'dpsp_maybe_unserialize' exists in the plugin code and is reachable by the application
  4. Identify high-privilege user accounts
    In WordPress admin, navigate to Users > All Users and review the role assigned to each account; contributor-level access and above (contributor, author, editor, administrator) can exploit this flaw
    Affected if There exists at least one user account with contributor-level access or higher who could potentially exploit this vulnerability
  5. Audit other plugins for POP chain potential
    Review all other installed plugins and themes for known PHP Object Injection POP chains or unserialize() usage that could be chained with this vulnerability to achieve remote code execution
    Affected if Other installed plugins or themes contain unserialize() calls or known POP chain gadgets that could be combined with this flaw

A user is affected if Hubbub Lite plugin version 1.33.1 or lower is installed and active, the vulnerable dpsp_maybe_unserialize function exists in the codebase, and at least one contributor-level or higher user account exists in WordPress, particularly if other plugins with exploitable POP chains are also 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 Hubbub Lite plugin to version 1.34.0 or later. Additionally, audit all other installed plugins and themes for potential POP chains that could be chained with this vulnerability, and limit contributor-level user accounts until the patch is applied.

Recommended fix Moderate confidence

1.34.0 or later

  1. Navigate to WordPress admin dashboard
  2. Go to Plugins > Installed Plugins
  3. Find 'Hubbub Lite – Fast, Reliable Social Sharing Buttons'
  4. If an update is available, click 'Update Now'
  5. Verify the updated version is 1.34.0 or later
  6. Alternatively, download the latest version from wordpress.org/plugins and upload via Plugins > Add New > Upload Plugin

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

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing3.0 h
  • Review / QA2.0 h
8.0 hours of engineering $1,390
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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-2024-2501 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
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