EWWW Image Optimizer < 8.7.7 - Author+ Stored XSS via Image Class Attribute Backreference Expansion

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-91011
StatePUBLISHED
AssignerWPScan
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 06:16:52 UTC
Updated2026-09-17 06:16:52 UTC
DescriptionThe 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.

Risk And Classification

Problem Types: CWE-79 Cross-Site Scripting (XSS)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Unknown EWWW Image Optimizer affected 8.7.7 semver Not specified

References

ReferenceSourceLinkTags
wpscan.com/vulnerability/334f14d5-f97b-4ec5-9b42-bb0803ae1668 [email protected] wpscan.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Artus KG (en)

CNA: WPScan (en)

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