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Weakness (CWE)

CWE-565: Reliance on Cookies without Validation and Integrity Checking

Base Incomplete

The product relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user.

How to prevent it (4 mitigations)

  1. Architecture and Design

    Avoid using cookie data for a security-related decision.

  2. Implementation

    Perform thorough input validation (i.e.: server side validation) on the cookie data if you're going to use it for a security related decision.

  3. Architecture and Design

    Add integrity checks to detect tampering.

  4. Architecture and Design

    Protect critical cookies from replay attacks, since cross-site scripting or other attacks may allow attackers to steal a strongly-encrypted cookie that also passes integrity checks. This mitigation applies to cookies that should only be valid during a single transaction or session. By enforcing timeouts, you may limit the scope of an attack. As part of your integrity check, use an unpredictable, server-side value that is not exposed to the client.

Source: MITRE CWE-565

All Critical High Medium Low Exploited only Public exploit

6 results · Clear filters · Feed

  • Medium 6.3
    CVE-2026-8337 Public exploit

    Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys when sites are running concurrent public surveys and private surveys

    Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys. To be vulnerable, a site would have to be configured in such a way that both public and private surveys are present on the site. An unauthenticated attacker can vote in the restricted survey by su…

    Concrete CMS Concrete CMS concrete5/concrete5 Packagist
  • High 7.8
    CVE-2026-0257 Exploited · Ransomware Public exploit EPSS 96%

    PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities

    Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker to bypass security restrictions and establish an unauthorized VPN connection. Panorama and Cloud NGFW are not impacted by …

    Palo Alto Networks PAN-OS Prisma Access Cloud NGFW Network devices
    KEV May 29, 2026
  • Critical 9.3
    CVE-2026-39324 Public exploit

    Rack::Session::Cookie secrets: decrypt failure fallback enables secretless session forgery and Marshal deserialization

    Rack::Session is a session management implementation for Rack. From 2.0.0 to before 2.1.2, Rack::Session::Cookie incorrectly handles decryption failures when configured with secrets:. If cookie decryption fails, the implementation falls back to a default deco…

    rack rack-session rack-session ruby-rack-session Debian Ubuntu RubyGems
  • Critical 9.8
    CVE-2025-14440 Public exploit

    JAY Login & Register <= 2.4.01 - Authentication Bypass via Cookie

    The JAY Login & Register plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.4.01. This is due to incorrect authentication checking in the 'jay_login_register_process_switch_back' function with the 'jay_login_regist…

    jayarsiech JAY Login & Register Web / CMS
  • High 8.4
    CVE-2024-55211 Public exploit

    An issue in Think Router Tk-Rt-Wr135G V3.0.2-X000 allows attackers to bypass authentication via a crafted cookie.

  • Critical 9.8
    CVE-2023-35885 Public exploit EPSS 74%

    CloudPanel 2 before 2.3.1 has insecure file-manager cookie authentication.