CVE-2026-7566 Deserialization in LearnPress – Backup & Migration Tool
Administrators can exploit PHP object injection via XML upload to execute code or access data if a POP chain exists in other installed plugins.
- 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-2026-7566?
CVE-2026-7566 is a medium-severity unsafe deserialization vulnerability in thimpress LearnPress – Backup & Migration Tool, published on 6 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The LearnPress – Backup & Migration Tool plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.1.4 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.
Weakness: CWE-502
Which versions are affected by CVE-2026-7566?
How do I fix CVE-2026-7566?
No fix has been published for CVE-2026-7566 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-2026-7566 being exploited?
There is no known exploitation of CVE-2026-7566 in the wild and no public exploit code.
Sources
Also known as GHSA-4jj4-xwhh-x5m2.