Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-22346 is a PHP Object Injection vulnerability affecting the WordPress plugin "Slider Responsive Slideshow – Image slider, Gallery slideshow" versions up to and including 1.5.4.'}, {'type': 'paragraph', 'content': 'This vulnerability allows a malicious actor to inject PHP objects, which can lead to various attacks such as code injection, SQL injection, path traversal, and denial of service if a suitable Property Oriented Programming (POP) chain is available.'}, {'type': 'paragraph', 'content': 'It is classified under the OWASP Top 10 category A3: Injection and has a CVSS score of 8.8, indicating a high likelihood of exploitation and a moderately dangerous risk.'}, {'type': 'paragraph', 'content': 'Exploitation requires contributor or developer-level privileges, and no official patch has been released yet, though mitigation rules are available from Patchstack.'}] [1]

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Impact Analysis

If exploited, this vulnerability can allow attackers to execute arbitrary code, perform SQL injection, traverse paths, or cause denial of service on your WordPress site using the affected plugin.

Such attacks can compromise the security and availability of your website, potentially leading to data breaches, website defacement, or service interruptions.

Since exploitation requires contributor or developer-level privileges, the risk is higher if an attacker already has some level of access to your site.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability affects the WordPress plugin "Slider Responsive Slideshow – Image slider, Gallery slideshow" versions up to and including 1.5.4. Detection involves identifying if this plugin and vulnerable version is installed on your system.'}, {'type': 'paragraph', 'content': 'Since the vulnerability involves PHP Object Injection, monitoring for unusual PHP object deserialization or suspicious HTTP requests targeting the plugin endpoints may help detect exploitation attempts.'}, {'type': 'list_item', 'content': 'Check the installed WordPress plugins and their versions using WP-CLI: wp plugin list'}, {'type': 'list_item', 'content': 'Search for the presence of the vulnerable plugin directory in your WordPress installation: ls wp-content/plugins/slider-responsive-slideshow'}, {'type': 'list_item', 'content': "Monitor web server logs for suspicious requests targeting the plugin, for example using grep: grep -i 'slider-responsive-slideshow' /var/log/apache2/access.log"}, {'type': 'list_item', 'content': 'Use intrusion detection systems or web application firewalls that can detect PHP Object Injection patterns or the specific Patchstack mitigation rule if implemented.'}] [1]

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Mitigation Strategies

No official patch has been released for this vulnerability as of the latest update.

Patchstack has issued a mitigation rule that can block attacks targeting this vulnerability until an official patch becomes available.

Users are advised to apply Patchstack’s mitigation measures immediately to protect their websites.

• Implement the Patchstack mitigation rule provided by Patchstack to block exploitation attempts.
• Restrict contributor or developer-level privileges to trusted users only, as exploitation requires such privileges.
• Monitor your systems for suspicious activity related to the plugin.
• Consider disabling or removing the vulnerable plugin until an official patch is released.

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