CVE-2026-6427— a3 Lazy Load <= 2.7.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Video Element
Possible ATT&CK Techniques 3AI
T1071 · Application Layer Protocol T1059 · Command and Scripting Interpreter T1189 · Drive-by CompromiseGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-6427
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
a3 Lazy Load <= 2.7.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Video Element
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 <video> elements, combined with unescaped output in the admin/views/form-data.php template. An authenticated attacker with Contributor-level access can insert a crafted <video> 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| a3rev | a3 Lazy Load | 0 ~ 2.7.6 | - |
II. Public POCs for CVE-2026-6427
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-6427
请登录查看更多情报信息。
Patches & Fixes for CVE-2026-6427 (6)
Other References for CVE-2026-6427 (1)
Other References for CVE-2026-6427 (1)
IV. Related Vulnerabilities
Same vendor: a3rev
- CVE-2025-9873
a3 Lazy Load <= 2.7.5 - Authenticated (Contributor+) Stored - CVE-2025-5123
Contact Us Page – Contact People <= 3.7.4 - Authenticated (C - CVE-2025-2816
Page View Count 2.8.0 - 2.8.4 - Missing Authorization to Aut - CVE-2024-12435
Compare Products for WooCommerce <= 3.2.1 - Reflected Cross- - CVE-2024-12313
Compare Products for WooCommerce <= 3.2.1 - Unauthenticated
Same weakness: CWE-79
- CVE-2026-4334
Shariff Wrapper <= 4.6.20 - Authenticated (Contributor+) Cro - CVE-2024-47097
Reflected Cross-Site Scripting in Follet School Solutions De - CVE-2024-47096
Reflected Cross-Site Scripting in Follet School Solutions De - CVE-2026-7052
HT Contact Form <= 2.8.2 - Unauthenticated Stored Cross-Site - CVE-2026-7660
Easy Updates Manager <= 9.0.20 - Reflected Cross-Site Script
V. Comments for CVE-2026-6427
No comments yet