CVE-2026-8353— Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in atomik theme
Possible ATT&CK Techniques 2AI
T1059 · Command and Scripting Interpreter T1556 · Modify Authentication ProcessAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Concrete CMS | Concrete CMS | 9.0≤ 9.5.0 | affected |
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I. Basic Information for CVE-2026-8353
Vulnerability Information
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Vulnerability Title
Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in atomik theme
Source: NVD (National Vulnerability Database)
Vulnerability Description
Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in the Atomik theme. A rogue editor can inject arbitrary JavaScript that executes in the context of any authenticated user visiting the affected account pages. This can lead to session hijacking, credential theft, malicious actions performed on behalf of users, and potential privilege escalation. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.1 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Concrete CMS | Concrete CMS | 9.0 ~ 9.5.0 | - |
II. Public POCs for CVE-2026-8353
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Pages for CVE-2026-8353 (1)
- 9.5.1 Release Notes :: Concrete CMSrelease-notes
Same Patch Batch · Concrete CMS · 2026-05-22 · 3 CVEs total
| CVE-2026-8340 | Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backend\File::approveVersion | |
| CVE-2026-8347 | Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in Express |
IV. Related Vulnerabilities
Same product: Concrete CMS
- CVE-2026-8347
Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-a - CVE-2026-8340
Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backe - CVE-2026-8139
Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via - CVE-2026-7890
Concrete CMS 9.5.0 is vulnerable to SSRF via RSS Displayer B - CVE-2026-8409
Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Requ
Same vendor: Concrete CMS
- CVE-2026-8347
Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-a - CVE-2026-8340
Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backe - CVE-2026-8139
Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via - CVE-2026-7890
Concrete CMS 9.5.0 is vulnerable to SSRF via RSS Displayer B - CVE-2026-8409
Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Requ
Same weakness: CWE-79
- CVE-2018-25349
userSpice 4.3.24 Cross-Site Scripting via X-Forwarded-For He - CVE-2026-41147
NukeViet CMS: Stored Cross-Site Scripting (XSS) via insuffic - CVE-2026-40607
MantisBT is Vulnerable to Stored XSS Through its Saved-Filte - CVE-2026-40598
MantisBT has Potential Referer-Based Reflected HTML Injectio - CVE-2026-40597
MantisBT has a Content Security Policy bypass via attachment
V. Comments for CVE-2026-8353
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