Weakness (CWE)
CWE-565: Reliance on Cookies without Validation and Integrity Checking
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)
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Architecture and Design
Avoid using cookie data for a security-related decision.
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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.
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Architecture and Design
Add integrity checks to detect tampering.
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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
19 results · Clear filters · Feed
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High 7.4
ZITADEL 4.0.0 before 4.19.5 Login V2 Account Takeover via Forgeable verificationCheck Cookie
ZITADEL 4.0.0 before 4.19.5 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to set the first credential of users lacking any authentication method. Attackers can compute a valid verificationCheck cookie…
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High 8.3
AshAdmin cookie reader matches names by substring, enabling actor/session shadowing from a sibling subdomain
Reliance on Cookies without Validation and Integrity Checking vulnerability in ash-project ash_admin lets an attacker who controls a sibling subdomain rebind an admin's session to a different actor, tenant, or authorization mode. AshAdmin's client JavaScript …
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High 8.1
Hermes WebUI < 0.51.368 - Profile-Scoped Authorization Bypass via Forged hermes_profile Cookie
Hermes WebUI before 0.51.368 contains an authorization bypass vulnerability in the get_profile_cookie() function that accepts unauthenticated profile names from the hermes_profile cookie. An authenticated attacker can forge the hermes_profile cookie value to …
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High 7.8
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 …
KEV May 29, 2026 -
High 8.8
Debugger & Troubleshooter <= 1.3.2 - Unauthenticated Privilege Escalation to Administrator via Cookie Manipulation
The Debugger & Troubleshooter plugin for WordPress was vulnerable to Unauthenticated Privilege Escalation in versions up to and including 1.3.2. This was due to the plugin accepting the wp_debug_troubleshoot_simulate_user cookie value directly as a user ID wi…
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High 8.7
COMMAX Biometric Access Control System Authentication Bypass
COMMAX Biometric Access Control System 1.0.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to access sensitive information and circumvent physical controls in smart homes and buildings by exploiting cookie poisoning. At…
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High 7.1
A reliance on cookies without validation and integrity checking vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.1,…
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High 8.8
Azure PlayFab Elevation of Privilege Vulnerability
Azure PlayFab Elevation of Privilege Vulnerability
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High 8.4CVE-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.
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High 8.8
NewType FlowMaster BPM Plus - Privilege Escalation
The FlowMaster BPM Plus system from NewType has a privilege escalation vulnerability. Remote attackers with regular privileges can elevate their privileges to administrator by tampering with a specific cookie.
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High 7.5
Electrolink FM/DAB/TV Transmitter Reliance on Cookies without Validation and Integrity Checking
The device allows an unauthenticated attacker to bypass authentication and modify the cookie to reveal hidden pages that allows more critical operations to the transmitter.
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High 8.8
Electrolink FM/DAB/TV Transmitter Reliance on Cookies without Validation and Integrity Checking
The application suffers from a privilege escalation vulnerability. An attacker logged in as guest can escalate his privileges by poisoning the cookie to become administrator.
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High 8.1
XSS in JupyterHub via Self-XSS leveraged by Cookie Tossing
JupyterHub is an open source multi-user server for Jupyter notebooks. By tricking a user into visiting a malicious subdomain, the attacker can achieve an XSS directly affecting the former's session. More precisely, in the context of JupyterHub, this XSS could…
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High 8.6
CSRF Token Validation Vulnerability in fiber
Fiber is an express inspired web framework written in Go. A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the application, which allows an attacker to obtain tokens and forge malicious requests on behalf of a user. This can lead to un…
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High 8.0
Cross-domain cookie leakage in Guzzle
Guzzle is a PHP HTTP client. Guzzle prior to versions 6.5.6 and 7.4.3 contains a vulnerability with the cookie middleware. The vulnerability is that it is not checked if the cookie domain equals the domain of the server which sets the cookie via the Set-Cooki…
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High 7.5
Cookie Prefix Spoofing in CGI::Cookie.parse
CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby.
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High 8.3
Secure/signed cookies share secrets between sites in rails_multisite
rails_multisite provides multi-db support for Rails applications. In affected versions this vulnerability impacts any Rails applications using `rails_multisite` alongside Rails' signed/encrypted cookies. Depending on how the application makes use of these coo…
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High 8.8
Circutor SGE-PLC1000 improper authentication
Improper Authentication vulnerability in the cookie parameter of Circutor SGE-PLC1000 firmware version 0.9.2b allows an attacker to perform operations as an authenticated user. In order to exploit this vulnerability, the attacker must be within the network wh…
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High 7.5
Centreon Does Not Set HTTPOnly Flag
In Centreon VM through 19.04.3, the cookie configuration within the Apache HTTP Server does not protect against theft because the HTTPOnly flag is not set.