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CVE-2026-107756— Meow Lightbox <= 5.6.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Output Buffering parser noise substitution via comment body + display_name

Quick assessment

Affected
tigroumeow Meow Lightbox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Meow Lightbox 插件存在存储型跨站脚本（Stored XSS）漏洞。该漏洞出现在 5.6.2 及更早版本中，原因是插件对用户输入的处理缺乏足够的净化措施以及输出时未进行适当的转义。具体而言，漏洞存在于 “display_name” 和 “comment” 参数中。 由于此缺陷，拥有订阅者（Subscriber）及以上权限的认证攻击者可以在网页中注入任意 Web 脚本。当其他用户访问包含该恶意脚本的页面时，脚本将自动执行，从而导致潜在的安全风险，例如会话劫持、敏感信息窃取或恶意重定

CVSS 6.4 · Medium EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 1

VendorProduct Version RangeStatus
tigroumeow Meow Lightbox ≤ 5.6.2 affected
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I. Basic Information for CVE-2026-107756

Vulnerability Information
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Vulnerability Title
Meow Lightbox <= 5.6.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Output Buffering parser noise substitution via comment body + display_name
Source: CVE Program / CVE List V5
Vulnerability Description
The Meow Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'display_name + comment' parameter in all versions up to, and including, 5.6.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is only exploitable when the plugin's Output Buffering option is enabled (disabled by default), and requires the attacker to have at least one previously approved comment on the site so that subsequent comments are auto-approved by WordPress core.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
tigroumeow Meow Lightbox 0 ~ 5.6.2 -

II. Public POCs for CVE-2026-107756

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III. Intelligence Information for CVE-2026-107756

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Other References for CVE-2026-107756 (2)

IV. Related Vulnerabilities

Same vendor: tigroumeow
Same weakness: CWE-79

V. Comments for CVE-2026-107756

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