CVE-2026-12115 Counter Box <= 2.0.13 - Authenticated (Administrator+) PHP Object Injection via Import
Authenticated administrators can exploit PHP object injection in the Counter Box 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-2026-12115?
CVE-2026-12115 is a medium-severity unsafe deserialization vulnerability in wpcalc Counter Box – Add Countdowns, Timers & Dynamic Counters to WordPress, published on 17 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Counter Box – Add Countdowns, Timers & Dynamic Counters to WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.0.13 via deserialization of untrusted input . 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. Deserialization is triggered automatically upon the post-import redirect that renders the list table, and again when any item is opened for editing, requiring no additional navigation beyond the import action itself.
Weakness: CWE-502
Which versions are affected by CVE-2026-12115?
How do I fix CVE-2026-12115?
No fix has been published for CVE-2026-12115 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-2026-12115 being exploited?
There is no known exploitation of CVE-2026-12115 in the wild and no public exploit code.
Sources
Also known as GHSA-v8h4-8wcw-7gjp.