CVE-2026-78572: Kalles Addons <= 1.0.6 - Unauthenticated PHP Object Injection
The Kalles Addons plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.0.6 via deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Affected Software
Event History
Frequently Asked Questions
What conditions are required for this issue to have an impact?
An attacker can reach the vulnerable deserialization behavior without authentication, but Kalles Addons has no known usable POP chain of its own. Meaningful impact requires another installed plugin or theme to provide a compatible POP chain.
Are sites affected by default if they have Kalles Addons installed?
The vulnerable object injection behavior affects Kalles Addons versions through 1.0.6, but the available information states that it has no impact without an additional plugin or theme containing a POP chain. Exposure therefore depends on the rest of the site's installed WordPress components.
What could an attacker do if a compatible POP chain exists?
Depending on the available POP chain, an unauthenticated attacker may be able to delete arbitrary files, retrieve sensitive data, or execute code. The specific outcome depends on the additional vulnerable or compatible plugin or theme present on the site.