CVE-2026-12240 Deserialization in Export User Data
Authenticated attackers can trigger arbitrary file deletion via PHP object injection in the Export User Data plugin, potentially leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-12240?
CVE-2026-12240 is a high-severity unsafe deserialization vulnerability in qlstudio Export User Data, published on 30 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
The Export User Data plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the unserialize function in all versions up to, and including, 2.2.6. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). Successful exploitation requires an administrator to trigger a user data export while a subscriber-level (or higher) user has stored a crafted serialized XLSXWriter object payload as their display name.
Weakness: CWE-502
Which versions are affected by CVE-2026-12240?
How do I fix CVE-2026-12240?
No fix has been published for CVE-2026-12240 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-2026-12240 being exploited?
There is no known exploitation of CVE-2026-12240 in the wild and no public exploit code.
Sources
Also known as GHSA-ww5c-p3qw-8xxf.