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CVE-2026-116563— Photo Gallery, Sliders, Proofing and Themes <= 4.5.4 - Unauthenticated Stored DOM-Based Cross-Site Scripting via Comment `title` Attribute via Shutter Lightbox innerHTML

Quick assessment

Affected
smub Photo Gallery, Sliders, Proofing and Themes – NextGEN 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 Photo Gallery、Sliders、Proofing 和 Themes – NextGEN Gallery 插件在所有 4.5.4 及更早版本中，由于输入清洗不足和输出转义缺失，存在通过"comment"参数引发的存储型 DOM 跨站脚本（Stored DOM-Based XSS）漏洞。该漏洞允许未认证的攻击者在页面中注入任意 Web 脚本，一旦用户访问被注入的页面，脚本即会执行。利用此漏洞需要满足以下条件：站点必须将 Shutter 或 Shutter Reloaded 选为活动灯

CVSS 5.4 · Medium
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I. Basic Information for CVE-2026-116563

Vulnerability Information
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Vulnerability Title
Photo Gallery, Sliders, Proofing and Themes <= 4.5.4 - Unauthenticated Stored DOM-Based Cross-Site Scripting via Comment `title` Attribute via Shutter Lightbox innerHTML
Source: CVE Program / CVE List V5
Vulnerability Description
The Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 4.5.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the site to have Shutter or Shutter Reloaded selected as the active lightbox, and the injected comment must be approved through WordPress's standard moderation workflow before the payload is rendered to other visitors.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/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
smub Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery 0 ~ 4.5.4 -

II. Public POCs for CVE-2026-116563

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III. Intelligence Information for CVE-2026-116563

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Other References for CVE-2026-116563 (8)

IV. Related Vulnerabilities

Same product: Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery
Same vendor: smub
Same weakness: CWE-79