CWE-1275

Sensitive Cookie with Improper SameSite Attribute

The SameSite attribute for sensitive cookies is not set, or an insecure value is used.

CVE-2026-8433 (GCVE-0-2026-8433)

Vulnerability from cvelistv5 – Published: 2026-05-21 21:25 – Updated: 2026-05-22 12:32
VLAI
Title
Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescan()
Summary
Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescan(). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-352 - Cross-Site request forgery (CSRF)
  • CWE-1275 - Sensitive cookie with improper SameSite attribute
Assigner
References
Impacted products
Vendor Product Version
Concrete CMS Concrete CMS Affected: 9.0 , ≤ 9.5.0 (git)
Create a notification for this product.
Credits
Yonatan Drori (Tenzai)
Show details on NVD website
To clipboard 

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CVE-2026-8434 (GCVE-0-2026-8434)

Vulnerability from cvelistv5 – Published: 2026-05-21 21:23 – Updated: 2026-05-22 12:29
VLAI
Title
Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescanMultiple()
Summary
Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescanMultiple(). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-352 - Cross-Site request forgery (CSRF)
  • CWE-1275 - Sensitive cookie with improper SameSite attribute
Assigner
References
Impacted products
Vendor Product Version
Concrete CMS Concrete CMS Affected: 9.0 , ≤ 9.5.0 (git)
Create a notification for this product.
Credits
Yonatan Drori (Tenzai)
Show details on NVD website
To clipboard 

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CVE-2026-8435 (GCVE-0-2026-8435)

Vulnerability from cvelistv5 – Published: 2026-05-21 21:22 – Updated: 2026-05-22 12:31
VLAI
Title
Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file approveVersion()
Summary
Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file approveVersion(). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-352 - Cross-Site request forgery (CSRF)
  • CWE-1275 - Sensitive cookie with improper SameSite attribute
Assigner
References
Impacted products
Vendor Product Version
Concrete CMS Concrete CMS Affected: 9.0 , ≤ 9.5.0 (git)
Create a notification for this product.
Credits
Yonatan Drori (Tenzai)
Show details on NVD website
To clipboard 

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Mitigation

Phase: Implementation

Description:

  • Set the SameSite attribute of a sensitive cookie to 'Lax' or 'Strict'. This instructs the browser to apply this cookie only to same-domain requests, which provides a good Defense in Depth against CSRF attacks. When the 'Lax' value is in use, cookies are also sent for top-level cross-domain navigation via HTTP GET, HEAD, OPTIONS, and TRACE methods, but not for other HTTP methods that are more like to cause side-effects of state mutation.
CAPEC-62: Cross Site Request Forgery

An attacker crafts malicious web links and distributes them (via web pages, email, etc.), typically in a targeted manner, hoping to induce users to click on the link and execute the malicious action against some third-party application. If successful, the action embedded in the malicious link will be processed and accepted by the targeted application with the users' privilege level. This type of attack leverages the persistence and implicit trust placed in user session cookies by many web applications today. In such an architecture, once the user authenticates to an application and a session cookie is created on the user's system, all following transactions for that session are authenticated using that cookie including potential actions initiated by an attacker and simply "riding" the existing session cookie.

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