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Deserialization of Untrusted DataWeakness · CWE-502

CVE-2026-22510

HIGH · 8.1 CVSS v3.1 Published 2026-03-25
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
90/100
Remediation priority · Urgent
Remotely reachable No privileges 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 AncoraThemes Melody melodyschool allows Object Injection.This issue affects Melody: from n/a through <= 1.6.3.

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

A PHP Object Injection vulnerability exists in the AncoraThemes Melody WordPress theme (melodyschool) due to unsafe deserialization of untrusted data. The vulnerability allows remote attackers to inject arbitrary PHP objects into the application context, potentially leading to code execution or other malicious activities depending on available magic methods in the application.

MitigationUpdate Melody theme to the latest patched version. If no patched version is available, consider disabling the theme and using an alternative, or implement input validation and sanitization on all deserialization operations.

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

CVSS:3.1/AV:N/AC:H/PR:N/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. Confirm Melody theme is installed
    Navigate to wp-content/themes/ directory and check for a folder named 'melody', 'melodyschool', or 'ancora-melody'. In WordPress admin, go to Appearance > Themes to verify if Melody theme is active or installed.
    Affected if The Melody theme by AncoraThemes (melodyschool) is present in the WordPress installation.
  2. Identify installed Melody theme version
    Open the theme's style.css file in wp-content/themes/melody/ (or melodyschool/) and look for the 'Version:' header in the file comments. Alternatively, check theme.json for the version field.
    Affected if The installed version cannot be confirmed as patched or is older than any available patched version.
  3. Locate deserialization functions in theme code
    Search theme PHP files for 'unserialize' calls using grep or a code search tool: grep -r "unserialize" wp-content/themes/melody/ or use a text editor to search. Focus on files that process user-supplied data.
    Affected if The theme contains unserialize() calls that process data from unauthenticated or user-controlled sources (e.g., $_GET, $_POST, $_COOKIE, $_REQUEST).
  4. Check if user input reaches deserialization
    Examine the files containing unserialize() calls. Trace whether parameters from HTTP requests ($_GET, $_POST, $_COOKIE, etc.) are passed directly or indirectly to the unserialize() function without validation.
    Affected if User-controllable data is passed to unserialize() without sanitization or validation, enabling injection of arbitrary PHP objects.
  5. Review for dangerous magic methods in theme context
    Search for magic methods in the theme and active plugins that could be chained with the injection: __destruct, __wakeup, __toString, __call, __invoke. Search with: grep -r "function __" wp-content/themes/melody/
    Affected if The application context contains magic methods that could be triggered by injected objects to achieve code execution or file operations.

A user is affected if the Melody theme (melodyschool) is installed and its code contains unserialize() calls that process untrusted user input, particularly when magic methods exist in the theme or plugin environment that could be exploited.

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.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update Melody theme to the latest patched version. If no patched version is available, consider disabling the theme and using an alternative, or implement input validation and sanitization on all deserialization operations.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
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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-2026-22510 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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