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CVE-2026-26351— GetSimpleCMS-CE < 3.3.22 Stored XSS via components.php

Quick assessment

Affected
GetSimpleCMS-CE GetSimpleCMS-CE
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.

GetSimple CMS是GetSimple CMS开源的一个内容管理系统。 GetSimple CMS 3.3.16版本存在跨站脚本漏洞，该漏洞源于组件功能中对slug字段的用户输入未进行适当的输出编码，可能导致存储型跨站脚本攻击，进而导致会话劫持、未经授权的管理操作或CMS管理界面被持久性破坏。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.45% · P38

Affected Version Matrix 2

VendorProduct Version RangeStatus
GetSimpleCMS-CE GetSimpleCMS-CE 3.3.16 affected
3.3.22 unaffected
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I. Basic Information for CVE-2026-26351

Vulnerability Information
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Vulnerability Title
GetSimpleCMS-CE < 3.3.22 Stored XSS via components.php
Source: CVE Program / CVE List V5
Vulnerability Description
GetSimpleCMS Community Edition (CE) versions prior to 3.3.22 (3.3.16 tested) contains a stored cross-site scripting (XSS) vulnerability in the Theme to Components functionality within components.php. User-supplied input provided to the "slug" field of a component is stored without proper output encoding. While other fields are sanitized using safe_slash_html(), the slug parameter is written to XML and later rendered in the administrative interface without sanitation, resulting in persistent execution of arbitrary JavaScript. An authenticated administrator can inject malicious script content that executes whenever the affected Components page is viewed by any authenticated user, enabling session hijacking, unauthorized administrative actions, and persistent compromise of the CMS administrative interface.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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
GetSimple CMS 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GetSimple CMS是GetSimple CMS开源的一个内容管理系统。 GetSimple CMS 3.3.16版本存在跨站脚本漏洞，该漏洞源于组件功能中对slug字段的用户输入未进行适当的输出编码，可能导致存储型跨站脚本攻击，进而导致会话劫持、未经授权的管理操作或CMS管理界面被持久性破坏。
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
GetSimpleCMS-CE GetSimpleCMS-CE 3.3.16 -

II. Public POCs for CVE-2026-26351

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III. Intelligence Information for CVE-2026-26351

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Vendor Pages for CVE-2026-26351 (1)

IV. Related Vulnerabilities

Same product: GetSimpleCMS-CE
Same vendor: GetSimpleCMS-CE
Same weakness: CWE-79