CVE-2026-2518 FastX <= 1.0.2 - Missing Authorization to Authenticated (Subscriber+) Limited Plugin Installation and Activation
Authenticated subscribers can install and activate the PostX plugin due to missing capability checks, potentially leading to privilege escalation or code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2518?
CVE-2026-2518 is a medium-severity missing authorization vulnerability in wpxpo FastX, published on 22 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The FastX theme for WordPress is vulnerable to unauthorized limited plugin installation and activation due to missing capability checks on the 'ultp_install_callback' and 'ultp_activate_callback' functions in all versions up to, and including, 1.0.2. This makes it possible for authenticated attackers, with Subscriber-level access and above, to install and activate the PostX plugin.
Weakness: CWE-862
Which versions are affected by CVE-2026-2518?
How do I fix CVE-2026-2518?
No fix has been published for CVE-2026-2518 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-2518 being exploited?
There is no known exploitation of CVE-2026-2518 in the wild and no public exploit code.
Sources
Also known as GHSA-jjqp-72fq-xmqp.