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CVE-2026-67617— Microweber CMS 2.0.20 Stored XSS via tag_names Parameter

Quick assessment

Affected
microweber microweber
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.

Microweber是Microweber公司开源的一款拖拽式网站构建平台。 Microweber 2.0.20及之前版本存在跨站脚本漏洞，该漏洞源于内容标记系统对tag_names参数处理不当，绕过多个清理控制，存在存储型跨站脚本漏洞，具有管理员身份认证的攻击者可注入任意JavaScript脚本，导致用户访问公共博客页面或管理员文章编辑器时执行，可能引发会话骑乘。

CVSS 4.8 · Medium EPSS 0.27% · P18

Affected Version Matrix 1

VendorProduct Version RangeStatus
microweber microweber ≤ 2.0.20 affected
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I. Basic Information for CVE-2026-67617

Vulnerability Information
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Vulnerability Title
Microweber CMS 2.0.20 Stored XSS via tag_names Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
Microweber CMS through 2.0.20 contains a stored cross-site scripting vulnerability in the content tagging system that allows admin-authenticated attackers to inject arbitrary JavaScript by submitting malicious payloads via the tag_names parameter of the GET /api/save_content_admin endpoint, bypassing three independent sanitization controls including XSS middleware that ignores GET requests, a strip_unsafe() function that only matches double-quoted onerror attributes, and a titlecase normalizer that passes HTML decimal entity-encoded payloads through unchanged. Attackers can store malicious scripts that execute without user interaction for every visitor to the public blog page and within the admin post editor, enabling session riding through same-origin fetch requests using the CSRF token embedded in the page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/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
Microweber 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microweber是Microweber公司开源的一款拖拽式网站构建平台。 Microweber 2.0.20及之前版本存在跨站脚本漏洞，该漏洞源于内容标记系统对tag_names参数处理不当，绕过多个清理控制，存在存储型跨站脚本漏洞，具有管理员身份认证的攻击者可注入任意JavaScript脚本，导致用户访问公共博客页面或管理员文章编辑器时执行，可能引发会话骑乘。
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
microweber microweber 0 ~ 2.0.20 -

II. Public POCs for CVE-2026-67617

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III. Intelligence Information for CVE-2026-67617

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Vendor Advisories for CVE-2026-67617 (1)

Proof of Concept for CVE-2026-67617 (1)

IV. Related Vulnerabilities

Same product: microweber
Same vendor: microweber
Same weakness: CWE-79

V. Comments for CVE-2026-67617

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