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CVE-2026-103897— Responsive Lightbox & Gallery <= 2.7.9 - Authenticated (Editor+) Stored Cross-Site Scripting via Comment Content 'title' Attribute

Quick assessment

Affected
dfactory Responsive Lightbox & Gallery
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 Responsive Lightbox & Gallery 插件存在存储型跨站脚本漏洞（Stored Cross-Site Scripting，简称 XSS）。该漏洞存在于所有 2.7.9 及更早版本中，原因是插件在处理“comment”参数时，缺乏足够的输入清理和输出转义机制。这使得具备编辑者及以上权限的已认证攻击者可以在页面中注入任意 Web 脚本，当其他用户访问被注入的页面时，这些脚本便会执行。 要成功利用此漏洞，需同时满足以下条件： 1. 插件的“Comments”（评论）灯箱功能必

CVSS 4.4 · Medium EPSS 0.21% · P10

Affected Version Matrix 1

VendorProduct Version RangeStatus
dfactory Responsive Lightbox & Gallery ≤ 2.7.9 affected
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I. Basic Information for CVE-2026-103897

Vulnerability Information
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Vulnerability Title
Responsive Lightbox & Gallery <= 2.7.9 - Authenticated (Editor+) Stored Cross-Site Scripting via Comment Content 'title' Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Responsive Lightbox & Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 2.7.9 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the plugin's 'Comments' lightbox setting to be enabled (disabled by default), a moderator to approve the injected comment, and a site visitor to click the affected image to open the lightbox.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/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
dfactory Responsive Lightbox & Gallery 0 ~ 2.7.9 -

II. Public POCs for CVE-2026-103897

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III. Intelligence Information for CVE-2026-103897

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Vendor Advisories for CVE-2026-103897 (1)

IV. Related Vulnerabilities

Same product: Responsive Lightbox & Gallery
Same vendor: dfactory
Same weakness: CWE-79

V. Comments for CVE-2026-103897

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