# CVE-2026-76547: User Profile Builder PHP Object Injection in import/export

Source: https://junglewise.ai/threats/cve-2026-76547-user-profile-builder-php-object-injection-in-import-export  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-29. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-76547 · Severity: medium · CVSS 6.6 · Published 2026-08-29

User Profile Builder is a popular WordPress plugin for creating custom user registration and profile forms. The plugin's import/export add-on (disabled by default) fails to validate data during configuration file imports, allowing administrators to inject malicious PHP objects. This can lead to arbitrary code execution if other vulnerable plugins are installed, potentially compromising the entire website.

Technologies: [Cozmoslabs Profile Builder](https://junglewise.ai/threats/technologies/profile-builder). Vendors: [Cozmoslabs](https://junglewise.ai/threats/vendors/cozmoslabs).

## Quick answers

**Is CVE-2026-76547 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76547 being exploited in the wild.

**How severe is CVE-2026-76547?** Medium severity, with a CVSS score of 6.6, published 29 August 2026.

**Which products and versions are affected?** Cozmoslabs Profile Builder before 4.0.1.

**Is there a fix for CVE-2026-76547?** A patch was published on 2026-08-29. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-76547 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-76547?** Check whether you run Cozmoslabs Profile Builder at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a PHP Object Injection (CWE-502) in the import/export add-on. When importing a configuration file, the plugin passes user-controlled data to maybe_unserialize() without type validation, allowing deserialization of arbitrary objects. Attack prerequisites include: the add-on must be explicitly enabled (disabled by default), attacker must hold administrator privileges (or network administrator on multisite), and a POP chain gadget must exist in another installed plugin or theme. The injected object's magic methods (__wakeup/__destruct) execute during the import request. Profile Builder itself contains no exploitable POP chain, limiting impact to gadgets from third-party plugins. The fix is available in version 4.0.1 and later.

## Affected products

- Cozmoslabs Profile Builder before 4.0.1

## Timeline

- 2026-08-27: disclosed
- 2026-08-29: patched

## References

- [https://wpscan.com/vulnerability/b80151f4-e910-4263-9ecc-470fb39d7583/](https://wpscan.com/vulnerability/b80151f4-e910-4263-9ecc-470fb39d7583/)

## Related threats

- [Cozmoslabs Profile Builder broken access control](https://junglewise.ai/threats/cve-2026-125776-missing-authorization-vulnerability-in-cozmoslabs-profile)
- [Cozmoslabs Profile Builder sensitive data exposure](https://junglewise.ai/threats/cve-2026-125777-insertion-of-sensitive-information-into-sent-data-vulnerability)
- [Profile Builder unauthenticated cross-site scripting](https://junglewise.ai/threats/cve-2026-54855-unauthenticated-cross-site-scripting-xss-in-profile-builder-4-0-5)
- [WordPress Profile Builder privilege escalation in user roles](https://junglewise.ai/threats/cve-2026-54854-contributor-privilege-escalation-in-profile-builder-4-0-5)
- [Cozmoslabs Profile Builder broken access control vulnerability](https://junglewise.ai/threats/cve-2026-54853-missing-authorization-vulnerability-in-cozmoslabs-profile-builder)