CVE-2026-91049: EWWW Image Optimizer (WordPress plugin) · Cross-site Scripting
Affects EWWW Image Optimizer (WordPress plugin)Source CVE Database V5
Mentioned vulnerabilities
Not known to be exploited : upgrade to 8.9.1 soon.
Data as of 5 Nov 2026, 06:27 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in 8.9.1
Exploitation evidence
Disclosed: evidence found.
CVE published 5 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Upgrade EWWW Image Optimizer (WordPress plugin) to 8.9.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| EWWW Image Optimizer | Affected
| Fixed in
|
AI-suggested
Upgrade the EWWW Image Optimizer plugin to version 8.9.1 or later, where this vulnerability is fixed. Versions 8.7.4 through 8.9.0 remain vulnerable due to bypassable origin and path restrictions. No other mitigation is indicated by the vendor advisory.
Description
The EWWW Image Optimizer WordPress plugin versions 8.7.4 through 8.9.0 contain a cross-site scripting (XSS) vulnerability that allows authenticated users with author-level access or higher to inject arbitrary scripts into post content. These scripts execute in the context of any user viewing the affected page, including administrators. The issue is due to improper sanitization and restriction of dynamic script loading. Version 8.9.1 fixes this vulnerability.