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Deserialization of Untrusted DataWeakness · CWE-502

CVE-2026-56032

CRITICAL · 9.8 CVSS v3.1 Published 2026-06-26
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click 8 weeks old

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
Subscriber PHP Object Injection in Buddyboss Platform <= 3.0.4 versions.

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 Buddyboss Platform <= 3.0.4 where untrusted user input (likely from a request parameter) is passed to PHP's unsafe unserialize() function. This allows authenticated subscribers to inject malicious PHP objects into the application scope, potentially leading to remote code execution if suitable POP (Property Oriented Programming) chains exist within the application or its plugins.

MitigationUpgrade Buddyboss Platform to the latest version. If immediate upgrade is not possible, sanitize and validate all user inputs before passing to unserialize(), replacing with safe deserialization methods like json_decode() where feasible.

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

CVSS:3.1/AV:N/AC:L/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. Verify BuddyBoss Platform is installed
    Check for the presence of BuddyBoss plugin files in wp-content/plugins/buddyboss-platform/ or look for BuddyBoss in WordPress plugin admin panel
    Affected if BuddyBoss Platform plugin or theme is present in the WordPress installation
  2. Identify installed BuddyBoss Platform version
    Navigate to WordPress Admin > Plugins > BuddyBoss Platform and note the version number, or check the main plugin file for a version constant
    Affected if Version is 3.0.4 or lower (the vulnerable version range)
  3. Confirm Subscriber-level user role exists
    Go to WordPress Admin > Users > Roles or inspect user capabilities table to verify Subscriber role is active and not disabled
    Affected if Subscriber role is enabled and accessible on the site
  4. Verify PHP deserialization is reachable
    Check if the BuddyBoss Platform REST API or AJAX endpoints that handle serialized data are accessible to authenticated users (look for endpoints under /bp-api/ or similar)
    Affected if Unauthenticated or low-privilege authenticated users can trigger deserialization handling within BuddyBoss components

Environment is affected if BuddyBoss Platform version 3.0.4 or lower is installed with the Subscriber role enabled and accessible to authenticated users who can trigger the unsafe deserialization mechanism.

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

Upgrade Buddyboss Platform to the latest version. If immediate upgrade is not possible, sanitize and validate all user inputs before passing to unserialize(), replacing with safe deserialization methods like json_decode() where feasible.

Recommended fix Moderate confidence

BuddyBoss Platform version greater than 3.0.4 (check WordPress plugin repository for latest stable release)

  1. 1. Backup your WordPress site and database before making any changes
  2. 2. Navigate to Plugins > Installed Plugins in your WordPress admin dashboard
  3. 3. Locate the BuddyBoss Platform plugin
  4. 4. Check the current installed version number
  5. 5. If the installed version is 3.0.4 or lower, update to the latest available version via the WordPress plugin updates
  6. 6. After updating, verify the new version number reflects the update
  7. 7. Test critical BuddyBoss functionality (member profiles, groups, forums) to ensure the update did not break existing features
  8. 8. Consider reviewing activity logs to ensure no exploitation occurred prior to patching
Caveat Standard BuddyBoss updates typically maintain backward compatibility, but always test in a staging environment first

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

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing8.0 h
  • Review / QA3.0 h
21.0 hours of engineering $3,620
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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-2026-56032 in production — separate from our analysis above.

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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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