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CVE-2026-34559— CI4MS: Blogs Tags Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS

Quick assessment

Affected
ci4-cms-erp ci4ms
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CI4MS是Ci4MS开源的一个博客页面管理工具。 CI4MS 0.31.0.0之前版本存在跨站脚本漏洞，该漏洞源于在创建或编辑博客标签时未能正确清理用户控制的输入，攻击者可以向标签名字段注入恶意JavaScript有效载荷，导致存储型跨站脚本攻击。

CVSS 9.1 · Critical EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2026-34559

Vulnerability Information
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Vulnerability Title
CI4MS: Blogs Tags Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS
Source: CVE Program / CVE List V5
Vulnerability Description
CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input when creating or editing blog tags. An attacker can inject a malicious JavaScript payload into the tag name field, which is then stored server-side. This stored payload is later rendered unsafely across public tag pages and administrative interfaces without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
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
CI4MS 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CI4MS是Ci4MS开源的一个博客页面管理工具。 CI4MS 0.31.0.0之前版本存在跨站脚本漏洞，该漏洞源于在创建或编辑博客标签时未能正确清理用户控制的输入，攻击者可以向标签名字段注入恶意JavaScript有效载荷，导致存储型跨站脚本攻击。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
ci4-cms-erp ci4ms < 0.31.0.0 -

II. Public POCs for CVE-2026-34559

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Qwen3.6-35B-A3B · 8286 chars
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III. Intelligence Information for CVE-2026-34559

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Vendor Advisories for CVE-2026-34559 (1)

Same Patch Batch · ci4-cms-erp · 2026-04-01 · 14 CVEs total

CVE-2026-34571 10.0 CRITICAL CI4MS: Stored Cross‑Site Scripting (Stored XSS) in Backend User Management Allows Session
CVE-2026-34569 10.0 CRITICAL CI4MS: Blogs Categories Full Account Takeover for All-Roles & Privilege-Escalation via Sto
CVE-2026-34568 9.1 CRITICAL CI4MS: Blogs Posts Full Account Takeover for All-Roles & Privilege-Escalation via Stored D
CVE-2026-34560 9.1 CRITICAL CI4MS: Logs Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS
CVE-2026-34567 9.1 CRITICAL CI4MS: Blogs Posts (Categories) Full Account Takeover for All-Roles & Privilege-Escalation
CVE-2026-34566 9.1 CRITICAL CI4MS: Pages Management Full Account Takeover for All-Roles & Privilege-Escalation via Sto
CVE-2026-34564 9.1 CRITICAL CI4MS: Menu Management (Pages) Full Account Takeover for All-Roles & Privilege-Escalation
CVE-2026-34563 9.1 CRITICAL CI4MS: Backup Management Full Account Takeover for All-Roles & Privilege-Escalation via St
CVE-2026-34565 9.1 CRITICAL CI4MS: Menu Management (Posts) Full Account Takeover for All-Roles & Privilege-Escalation
CVE-2026-34572 8.8 HIGH CI4MS: Account Deactivation Module Full Persistent Unauthorized Access for All‑Roles via I
CVE-2026-34570 8.8 HIGH CI4MS: Account Deletion Module Full Persistent Unauthorized Access for All‑Roles via Impro
CVE-2026-34562 4.7 MEDIUM CI4MS: System Settings (Company Information) Full Platform Compromise & Full Account Takeo
CVE-2026-34561 4.7 MEDIUM CI4MS: System Settings (Social Media Management) Full Platform Compromise & Full Account T

IV. Related Vulnerabilities

Same product: ci4ms
Same vendor: ci4-cms-erp
Same weakness: CWE-79

V. Comments for CVE-2026-34559

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