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CVE-2026-40332— Masa CMS open redirect via improper handling of scheme-relative URLs

Quick assessment

Affected
MasaCMS MasaCMS
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.

Masa CMS是Masa CMS组织的一个数字体验平台。 Masa CMS存在输入验证错误漏洞，该漏洞源于对方案相对URL处理不当，可能导致攻击者通过以双斜杠开头的URL将受害者重定向到外部攻击者控制的站点。

AI Predicted 5.4 Difficulty: Trivial EPSS 0.54% · P44

Possible ATT&CK Techniques 1 AI

T1583.001 · Domains

Affected Version Matrix 4

VendorProduct Version RangeStatus
MasaCMS MasaCMS < 7.2.10 affected
>= 7.3.0, < 7.3.15 affected
>= 7.4.0, < 7.4.10 affected
>= 7.5.0, < 7.5.3 affected
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I. Basic Information for CVE-2026-40332

Vulnerability Information
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Vulnerability Title
Masa CMS open redirect via improper handling of scheme-relative URLs
Source: CVE Program / CVE List V5
Vulnerability Description
Masa CMS is affected by an Open Redirect vulnerability due to improper handling of scheme-relative URLs. The application incorrectly interprets paths beginning with double slashes (//) as internal paths, failing to validate the redirect target before processing. The application treats these values as internal paths and processes them without confirming that the redirect target remains on the local site. An attacker can craft a URL on the trusted Masa CMS domain that redirects a victim to an external attacker-controlled site. This can be used for phishing and, in some authentication flows, may expose tokens or other sensitive data to the external site. This issue has been fixed in versions 7.2.10, 7.3.15, 7.4.10, and 7.5.3. As a workaround, reject or rewrite redirect parameters that begin with // and consider disabling forceDirectoryStructure if compatible with the deployment.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Masa CMS 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Masa CMS是Masa CMS组织的一个数字体验平台。 Masa CMS存在输入验证错误漏洞，该漏洞源于对方案相对URL处理不当，可能导致攻击者通过以双斜杠开头的URL将受害者重定向到外部攻击者控制的站点。
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
MasaCMS MasaCMS < 7.2.10 -

II. Public POCs for CVE-2026-40332

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III. Intelligence Information for CVE-2026-40332

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Vendor Advisories for CVE-2026-40332 (1)

Same Patch Batch · MasaCMS · 2026-05-06 · 5 CVEs total

CVE-2026-40309 Masa CMS CSRF in trash management allows unauthorized permanent deletion of deleted conten
CVE-2026-40325 Masa CMS CSRF in content restoration allows unauthorized restoration of deleted content
CVE-2026-40326 Masa CMS CSRF in site bundle creation allows unauthorized site data export
CVE-2026-40174 Masa CMS CSRF in user address management allows unauthorized address changes

IV. Related Vulnerabilities

Same product: MasaCMS
Same vendor: MasaCMS
Same weakness: CWE-601

V. Comments for CVE-2026-40332

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