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Deserialization of Untrusted DataWeakness · CWE-502

CVE-2025-58218

HIGH · 7.2 CVSS v3.1 Published 2025-08-27
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
78/100
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
Deserialization of Untrusted Data vulnerability in enituretechnology Small Package Quotes – USPS Edition small-package-quotes-usps-edition allows Object Injection.This issue affects Small Package Quotes – USPS Edition: from n/a through <= 1.3.9.

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 confidence

PHP Object Injection vulnerability in the enituretechnology Small Package Quotes – USPS Edition WordPress plugin allows remote attackers to deserialize untrusted data through vulnerable deserialization functions, potentially leading to code execution, file operations, or SQL injection depending on available gadget chains in the plugin or WordPress environment.

MitigationReplace unsafe unserialize() calls with json_decode() for data storage, implement strict input validation, and update to a patched version once released. If immediate mitigation is required, disable the plugin until a fix is available.

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
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:H/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 plugin is installed
    In WordPress admin, go to Plugins > Installed Plugins and look for 'Small Package Quotes - USPS Edition' by Eniture Technology, or check the filesystem at wp-content/plugins/ for a folder containing 'eniture-technology' and 'usps' in the name.
    Affected if The plugin is installed and active on the WordPress site.
  2. Identify installed plugin version
    In WordPress admin Plugins page, click the plugin name to view details and find the version number. Alternatively, check the main plugin PHP file for the 'Version' header in the plugin comment block.
    Affected if The installed version matches or falls within the range of affected versions that contain the unsafe unserialize() vulnerability.
  3. Locate deserialization functions in plugin code
    Using a file search or grep tool, scan the plugin directory for occurrences of 'unserialize(' - examine files that handle incoming data from HTTP requests, AJAX endpoints, or stored options.
    Affected if The plugin code contains unserialize() calls that process data from untrusted sources without prior sanitization.
  4. Check if user input reaches vulnerable deserialization
    Review the code paths around any found unserialize() calls to determine if $_GET, $_POST, $_REQUEST, or database/stored options values are passed directly to unserialize().
    Affected if Untrusted user-supplied data (via request parameters or stored data) flows into an unserialize() call without validation.

A site is affected if the plugin is installed, contains the unsafe unserialize() call, and allows untrusted input to reach that deserialization function.

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

Replace unsafe unserialize() calls with json_decode() for data storage, implement strict input validation, and update to a patched version once released. If immediate mitigation is required, disable the plugin until a fix is available.

Recommended fix Low confidence

Latest available version > 1.3.9 (contact vendor for specific patched release)

  1. Log in to the WordPress admin dashboard
  2. Navigate to Plugins > Installed Plugins
  3. Locate 'Small Package Quotes – USPS Edition' by enituretechnology
  4. Check if an update is available for the plugin
  5. If an update is available, click 'Update Now' to install the latest version
  6. If no update is shown in WordPress, manually download the latest version from the WordPress Plugin Repository or contact enituretechnology for the patched release
  7. After updating, verify the plugin is functioning correctly on the storefront

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

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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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-2025-58218 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