---
id: CVE-2026-91011
title: >-
  The EWWW Image Optimizer WordPress plugin before 8.7.7 does not properly
  escape image attribute values when it rewrites page output, allowing
  authenticated users with author-level access and above to inject arbitrary
  JavaScript that is s…
summary: >-
  The EWWW Image Optimizer WordPress plugin before 8.7.7 does not properly
  escape image attribute values when it rewrites page output, allowing
  authenticated users with author-level access and above to inject arbitrary
  JavaScript that is s…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-79
product: EWWW Image Optimizer
affected:
  - ewww_image_optimizer < 8.7.7
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:08:32.830'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91011'
references:
  - url: 'https://wpscan.com/vulnerability/334f14d5-f97b-4ec5-9b42-bb0803ae1668/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
epss: 0.00235
epssPercentile: 0.14805
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-17T12:10:43.512611Z'
ingestedAt: '2026-09-17T06:12:17.972Z'
---

## Overview

The EWWW Image Optimizer WordPress plugin before 8.7.7 does not properly escape image attribute values when it rewrites page output, allowing authenticated users with author-level access and above to inject arbitrary JavaScript that is stored in published content and executes in the browser of any user who later views the affected page.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.