Vulnerability · Published Nov 5, 2026 · Assigned by WPScan

CVE-2026-91049EWWW Image Optimizer 8.7.4 - 8.9.0 - Author+ Stored XSS via 'data-script' Lazy Load Attribute

Unrated

In plain English

A security flaw 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 0.2% (higher than 6% of all known vulnerabilities).

Severity (CVSS )–Not rated

Exploit odds (30 days)0.2%top 93.7% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

The EWWW Image Optimizer WordPress plugin before 8.9.1 does not properly sanitize and restrict a value in post content before using it to dynamically load and execute a script in the page, allowing authenticated attackers with author-level access and above to inject arbitrary web scripts that run in the session of any user who views the affected page, including administrators. This is an incomplete fix of CVE-2026-15446: the origin and path restrictions added from 8.7.4 onward were each bypassable, so versions 8.7.4 through 8.9.0 remain affected.

Affected products (as reported)

Vendor	Product	Versions
Unknown	EWWW Image Optimizer	8.7.4 – before 8.9.1

References

https://wpscan.com/vulnerability/cdaf3779-3e8a-4997-9868-707bcc06f9a7/ exploit, vdb-entry, technical-description