CVE-2026-3017 Deserialization in Smart Post Show – Post Grid, Post Carousel & Slider, and List Category Posts
Administrators can exploit PHP object injection in this WordPress plugin to potentially execute code or access data if a POP chain exists.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3017?
CVE-2026-3017 is a high-severity unsafe deserialization vulnerability in shapedplugin Smart Post Show – Post Grid, Post Carousel & Slider, and List Category Posts, published on 14 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Smart Post Show – Post Grid, Post Carousel & Slider, and List Category Posts plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.0.12 via deserialization of untrusted input in the import_shortcodes() function. This makes it possible for authenticated attackers, with Administrator-level access and above, 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.
Weakness: CWE-502
Which versions are affected by CVE-2026-3017?
How do I fix CVE-2026-3017?
No fix has been published for CVE-2026-3017 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-3017 being exploited?
There is no known exploitation of CVE-2026-3017 in the wild and no public exploit code.
Sources
Also known as GHSA-vw96-fcx4-fx55.