The EWWW Image Optimizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'data-script' Lazy Load Attribute in Post Content in all versions up to, and including, 8.7.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit is achieved by embedding a crafted img element with class='lazyload' and a data-script attribute pointing to an attacker-controlled URL in post content, which the plugin's bundled lazysizes ls.unveilhooks addon then uses to dynamically create and insert a script element into the DOM at page view time.
Metrics
Affected Vendors & Products
References
History
Fri, 21 Aug 2026 16:30:00 +0000
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ssvc
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Fri, 21 Aug 2026 13:00:00 +0000
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Nosilver4u
Nosilver4u ewww Image Optimizer Wordpress Wordpress wordpress |
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Nosilver4u
Nosilver4u ewww Image Optimizer Wordpress Wordpress wordpress |
Wed, 19 Aug 2026 07:00:00 +0000
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| Description | The EWWW Image Optimizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'data-script' Lazy Load Attribute in Post Content in all versions up to, and including, 8.7.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit is achieved by embedding a crafted img element with class='lazyload' and a data-script attribute pointing to an attacker-controlled URL in post content, which the plugin's bundled lazysizes ls.unveilhooks addon then uses to dynamically create and insert a script element into the DOM at page view time. | |
| Title | EWWW Image Optimizer <= 8.7.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'data-script' Lazy Load Attribute in Post Content | |
| Weaknesses | CWE-79 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Wordfence
Published: 2026-08-19T06:37:54.690Z
Updated: 2026-08-20T15:26:35.613Z
Reserved: 2026-07-10T19:15:03.406Z
Link: CVE-2026-15446
Updated: 2026-08-20T15:26:21.481Z
Status : Deferred
Published: 2026-08-19T07:16:27.530
Modified: 2026-08-20T16:17:08.427
Link: CVE-2026-15446
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