# CVE-2026-78262: WP Project Manager PHP Object Injection

Source: https://junglewise.ai/threats/cve-2026-78262-wp-project-manager-php-object-injection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-24. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-78262 · Severity: critical · CVSS 9.8 · Published 2026-08-24

WP Project Manager is a popular WordPress plugin used to organize and manage projects and tasks on websites. Attackers can exploit an unauthenticated PHP Object Injection vulnerability to execute arbitrary code on affected servers, potentially compromising site data, disrupting operations, and allowing further attacks. The flaw affects versions 4.0.6 and earlier and requires only network access—no login credentials needed.

Technologies: [weDevs WP Project Manager](https://junglewise.ai/threats/technologies/wp-project-manager). Vendors: [weDevs](https://junglewise.ai/threats/vendors/wedevs).

## Quick answers

**Is CVE-2026-78262 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-78262 being exploited in the wild.

**How severe is CVE-2026-78262?** Critical severity, with a CVSS score of 9.8, published 24 August 2026.

**Which products and versions are affected?** weDevs WP Project Manager ≤ 4.0.6.

**Is there a fix for CVE-2026-78262?** A patch was published on 2026-08-24: Fixed in version 4.0.7 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-78262 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-78262?** Check whether you run weDevs WP Project Manager 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 flaw in WP Project Manager versions ≤ 4.0.6 that allows unauthenticated remote code execution. The affected plugin fails to properly validate or sanitize serialized object data before deserialization, enabling attackers to craft malicious payloads that instantiate and invoke arbitrary PHP classes. Attack requires only network access to the WordPress site; no authentication or user interaction is needed. Successful exploitation allows attackers to execute arbitrary PHP code with the privileges of the web server process. The vulnerability was patched in version 4.0.7, released 24 August 2026.

## Affected products

- weDevs WP Project Manager ≤ 4.0.6

## Timeline

- 2026-08-24: disclosed: Vulnerability published on Patchstack database
- 2026-08-24: patched: Fixed in version 4.0.7

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/wedevs-project-manager/vulnerability/wordpress-wp-project-manager-plugin-4-0-6-php-object-injection-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/wedevs-project-manager/vulnerability/wordpress-wp-project-manager-plugin-4-0-6-php-object-injection-vulnerability?_s_id=cve)

## Related threats

- [WP Project Manager broken access control in subscriber functionality](https://junglewise.ai/threats/cve-2026-97281-subscriber-broken-access-control-in-wp-project-manager-4-0-7)
- [WP Project Manager unauthorized activity disclosure via IDOR](https://junglewise.ai/threats/cve-2026-74930-wp-project-manager-unauthorized-activity-disclosure-via-idor)
- [WP Project Manager privilege escalation via REST API IDOR](https://junglewise.ai/threats/cve-2026-74929-wp-project-manager-privilege-escalation-via-rest-api-idor)
- [WP Project Manager missing authorization in import routes](https://junglewise.ai/threats/cve-2026-74928-wp-project-manager-missing-authorization-in-import-routes)