CVE-2026-15446Network attack vector

Stored XSS via lazy-load data-script

Published Aug 19, 2026 · Updated Aug 20, 2026

Stored XSS in EWWW Image Optimizer before 8.7.4 allows remote authenticated users to execute JavaScript via crafted post content. The lazy-load feature accepts a user-supplied data-script attribute on img elements, and the bundled ls.unveilhooks addon turns that value into a script element inserted into the DOM without restricting the source to trusted domains. Reachability requires contributor-level or higher WordPress access to save affected content, and the resulting impact is script execution in the browsers of users who view the poisoned page.

CVSS severity6.4
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in EWWW Image Optimizer before 8.7.4 allows remote authenticated users to execute JavaScript via crafted post content. The lazy-load feature accepts a user-supplied data-script attribute on img elements, and the bundled ls.unveilhooks addon turns that value into a script element inserted into the DOM without restricting the source to trusted domains. Reachability requires contributor-level or higher WordPress access to save affected content, and the resulting impact is script execution in the browsers of users who view the poisoned page.

The record

CVE
CVE-2026-15446
Published
Aug 19, 2026
Updated
Aug 20, 2026
Vendor
Exactly WWW
Product
EWWW Image Optimizer
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=8.7.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Exactly WWW · EWWW Image Optimizerversion=0 <=8.7.3

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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