PT-2026-44198 · A3Rev · A3 Lazy Load
Youcef Hamdani
·
Published
2026-05-28
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Updated
2026-05-28
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CVE-2026-6427
CVSS v3.1
6.4
Medium
| Vector | AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
The a3 Lazy Load plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.7.6 This is due to a regex bug in the filter videos() method that breaks HTML attribute quoting when processing crafted elements, combined with unescaped output in the admin/views/form-data.php template. An authenticated attacker with Contributor-level access can insert a crafted tag whose src attribute contains an embedded class=" substring that tricks the plugin's class-replacement regex into consuming an attribute-value closing quote. This shifts the HTML5 parser's quote boundary, promoting attacker-controlled text from inside a quoted attribute value into standalone event-handler attributes (autofocus, onfocus). The injected script executes in the browser of any user (including administrators) who views the post.
Fix
XSS
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Weakness Enumeration
Related Identifiers
Affected Products
A3 Lazy Load