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.

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Fixes

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History

Thu, 05 Nov 2026 08:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Thu, 05 Nov 2026 06:15:00 +0000

Type Values Removed Values Added
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.
Title EWWW Image Optimizer 8.7.4 - 8.9.0 - Author+ Stored XSS via 'data-script' Lazy Load Attribute
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-11-05T06:00:27.687Z

Reserved: 2026-09-14T17:15:02.383Z

Link: CVE-2026-91049

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-05T06:17:10.317

Modified: 2026-11-05T06:17:10.317

Link: CVE-2026-91049

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-05T08:15:17Z

Weaknesses