Vulnerability · Published Sep 17, 2026 · Assigned by WPScan
CVE-2026-91011EWWW Image Optimizer < 8.7.7 - Author+ Stored XSS via Image Class Attribute Backreference Expansion
Medium 6.8
In plain English
A medium-severity cross-site scripting in EWWW Image Optimizer from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.4%top 62.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | EWWW Image Optimizer | 0 – before 8.7.7 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
References
- https://wpscan.com/vulnerability/334f14d5-f97b-4ec5-9b42-bb0803ae1668/ exploit, vdb-entry, technical-description