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CVE-2026-2868— Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem <= 3.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'separatorIconSVG'

Quick assessment

Affected
jegstudio Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem
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和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem 3.5.3及之前版本存在跨站脚本漏洞，该漏洞源于对separatorIconSVG参数的输入

CVSS 6.4 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 1

VendorProduct Version RangeStatus
jegstudio Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem ≤ 3.5.3 affected
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I. Basic Information for CVE-2026-2868

Vulnerability Information
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Vulnerability Title
Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem <= 3.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'separatorIconSVG'
Source: CVE Program / CVE List V5
Vulnerability Description
The Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'separatorIconSVG' parameter in versions up to, and including, 3.5.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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
Vulnerability Title
WordPress plugin Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem 3.5.3及之前版本存在跨站脚本漏洞，该漏洞源于对separatorIconSVG参数的输入
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
jegstudio Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem 0 ~ 3.5.3 -

II. Public POCs for CVE-2026-2868

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III. Intelligence Information for CVE-2026-2868

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Vendor Advisories for CVE-2026-2868 (1)

IV. Related Vulnerabilities

Same product: Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem
Same vendor: jegstudio
Same weakness: CWE-79

V. Comments for CVE-2026-2868

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