CVE-2026-78572
Received Received - Intake

PHP Object Injection in Kalles Addons WordPress Plugin

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: Wordfence

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.

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Meta Information

Published
2026-08-25
Last Modified
2026-08-25
Generated
2026-08-25
AI Q&A
2026-08-25
EPSS Evaluated
N/A
NVD
CVE-2026-78572
EUVD
EUVD-2026-65355

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
kalles_addons kalles_addons to 1.0.6 (inc)
kalles addons to 1.0.6 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

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Executive Summary

The Kalles Addons plugin for WordPress has a PHP Object Injection vulnerability in versions up to 1.0.6. This flaw allows unauthenticated attackers to inject a PHP object through deserialization of untrusted input. However, exploitation requires another plugin or theme with a POP chain to be present on the site.

Detection Guidance

Detecting this vulnerability requires checking if the Kalles Addons plugin version 1.0.6 or earlier is installed on your WordPress site. Review installed plugins via the WordPress admin panel or run commands like 'wp plugin list' in the WordPress directory. Inspect plugin files for suspicious deserialization functions or untrusted input handling.

Impact Analysis

If exploited, this vulnerability could allow attackers to delete arbitrary files, retrieve sensitive data, or execute code on the affected WordPress site. This depends on whether another installed plugin or theme contains a POP chain that enables these actions.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR or HIPAA if an attacker exploits it to retrieve sensitive data or execute code. However, the actual impact depends on whether a POP chain is present in another installed plugin or theme. Without a POP chain, the vulnerability has no direct impact.

Mitigation Strategies

Immediately update the Kalles Addons plugin to the latest version if available. If no update exists, consider disabling or removing the plugin until a patch is released. Review other installed plugins and themes for POP chains that could exploit this vulnerability.

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