CVE-2026-91011 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00158.

Exploitation none

Automatable no

Technical Impact total

No data.

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://wpscan.com/vulnerability/334f14d5-f97b-4ec5-9b42-bb0803ae1668/

History

Thu, 17 Sep 2026 13:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-79
Metrics		cvssV3_1 `{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Thu, 17 Sep 2026 06:15:00 +0000

Type	Values Removed	Values Added
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.
Title		EWWW Image Optimizer < 8.7.7 - Author+ Stored XSS via Image Class Attribute Backreference Expansion
References		https://wpscan.com/vulnerability/334f14d5-f97b-4ec5-9b42-bb0803ae1668/

Projects

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MITRE

Status: PUBLISHED

Assigner: WPScan

Published: 2026-09-17T06:00:13.250Z

Updated: 2026-09-17T12:26:09.671Z

Reserved: 2026-09-14T16:12:49.896Z

Link: CVE-2026-91011

Vulnrichment

Updated: 2026-09-17T12:09:37.986Z

NVD

Status : Received

Published: 2026-09-17T06:16:52.857

Modified: 2026-09-17T13:16:59.527

Link: CVE-2026-91011

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-79

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