CVE-2026-16042 LWS Optimize < 3.4 - Subscriber+ Cache Deletion
Authenticated users can flush site caches without authorization, causing performance degradation and potential denial of service.
- 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-2026-16042?
CVE-2026-16042 is a medium-severity missing authorization vulnerability in Unknown LWS Optimize, published on 2 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The LWS Optimize WordPress plugin before 3.4 does not perform a capability check on its cache-clearing actions, allowing any authenticated user, including Subscribers, to flush the site's caches and force repeated cache rebuilds.
Weakness: CWE-862
Which versions are affected by CVE-2026-16042?
How do I fix CVE-2026-16042?
No fix has been published for CVE-2026-16042 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-2026-16042 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16042 exists.
Sources
Also known as GHSA-6h82-r4vw-xr2m.