CVE-2026-91051
The EWWW Image Optimizer WordPress plugin before 8.8.0 does not prevent authenticated users with author-level permissions from storing a serialized value in a post meta field that is deserialized when the post is rendered, allowing them to perform PHP Object Injection, which can lead to remote code execution when a suitable gadget chain is present via another installed EWWW Image Optimizer WordPress plugin before 8.8.0 or .
- Published Sep 30, 2026
- CVSS 6.6 medium
- 0.4% chance of exploitation in the next 30 days (EPSS)
- A fix is available