Name: CVE-2026-91051: Deserialization of Untrusted Data
Creator: Rapid7
Published: 2026-09-30T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-91051, CWE-502, CVSS 6.6, EPSS 0.00358

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 .

CVSS Details

CVSS 3.1 Base Score: 6.6
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Ewww Image Optimizer Plugin	—	Update ewww-image-optimizer plugin to version 8.8.0, or a newer patched version	Oct 30, 2026	Sep 28, 2026

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CVSS Details

Covered by Rapid7

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