Kalles Addons permits unauthenticated PHP object injection
Kalles Addons through 1.0.6 deserializes untrusted input, allowing an unauthenticated attacker to inject a PHP object. The plugin does not supply a known POP chain itself, but a usable chain in another installed plugin or theme can enable arbitrary file deletion, sensitive-data retrieval, or code execution.
- Component
- Kalles Addons
- Plugin slug
kalles-addons- Affected
- <= 1.0.6
- Safe version
- See mitigation notes
- Published
- Aug 25, 2026
This CVE was published Aug 25, 2026 and is one of 3 known issues for this plugin.
Update, patch or deactivate.
No fixed release is identified. Update when a confirmed patch is available; until then, deactivate the plugin when warranted and treat sites with other deserialization gadget chains as at elevated risk.
No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H