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
52 results · 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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Medium 6.5
Happy DOM: Cookie scope forgery: no DNS-label boundary on Domain= matching , attacker origin sets victim cookies
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 20.14.6, Happy DOM's CookieContainer in src/cookie/CookieContainer.ts does not correctly validate or match Domain cookie attributes. It can accept a Domai…
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Critical 9.1
Sunhillo SureLine Authentication Bypass via Session Cookie
Sunhillo SureLine before 9.1.5 contains an authentication bypass vulnerability that allows an unauthenticated remote attacker to impersonate any user with an active web session by forging a session cookie containing only a cleartext username with no random id…
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Low 2.3
AIOHTTP: Cookie from subdomain can remove Host-Only Scope from existing cookies
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, Host-Only scope on an existing parent-domain cookie can be removed by a subdomain. A user who accesses an untrusted subdomain can consequently have host-only prot…
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Critical 9.3
Authentication bypass in Stela by Diaple Networking
Authentication bypass vulnerability in Stela, versions prior to 1.60.1, due to the use of a cookie named “authProcess” without validating its integrity. The application stores the user identifier (userId) and the status of the authentication process (validSte…
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Critical 9.1
Apache Airflow Keycloak provider: Keycloak token cookies not bound to Airflow session identity
Apache Airflow Keycloak provider: from Airflow 3.3 the Keycloak auth manager takes a user's identity from the signed Airflow session token but takes the Keycloak access and refresh tokens used for every authorization decision from separate, unauthenticated co…
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Medium 6.8
Http4s: CookieJar middleware matches by substring, leaking cookies cross-origin
Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware uses unanchored substring checks instead of RFC 6265 domain and path matching when deciding whether to attach a stored cookie. A cookie for example.…
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Medium 6.8
Http4s: CookieJar middleware accepts arbitrary Set-Cookie domain
Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware stores a response cookie’s Domain attribute without checking that it domain-matches the host that supplied the cookie or rejecting public suffixes. …
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Critical 9.8
CAT through 3.1.0 Session Cookie Forgery via Unkeyed hashCode Checksum
CAT uses Java String.hashCode as the sole integrity check for session cookies without server-side keying, allowing attackers to forge valid checksums offline. Attackers can set the x-forwarded-for header to bypass IP binding validation and create admin sessio…
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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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Medium 6.3CVE-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…
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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 -
Medium 6.9
Serendipity: Host Header Injection enables authentication cookie scoping to an attacker-controlled domain
Serendipity is a PHP-powered weblog engine. In versions 2.6-beta2 and below, the serendipity_setCookie() function in include/functions_config.inc.php uses $_SERVER['HTTP_HOST'] without validation as the domain parameter of setcookie(). An attacker who can inf…
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Critical 9.3CVE-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…
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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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Critical 9.8
Plack::Middleware::Session::Cookie versions through 0.21 for Perl allows remote code execution
Plack::Middleware::Session::Cookie versions through 0.21 for Perl allows remote code execution. Plack::Middleware::Session::Cookie versions through 0.21 has a security vulnerability where it allows an attacker to execute arbitrary code on the server during de…
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Critical 9.8
WAGO 750-8212 PFC200 G2 2ETH RS Privilege Escalation
WAGO 750-8212 PFC200 G2 2ETH RS firmware contains a privilege escalation vulnerability that allows attackers to manipulate user session cookies. Attackers can modify the cookie's 'name' and 'roles' parameters to elevate from ordinary user to administrative pr…
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Critical 9.8
An issue was discovered in NJHYST HY511 POE core before 2.1 and plugins before 0.1. The vulnerability stems from the de…
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Critical 9.8CVE-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…
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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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Medium 6.5
In Brave Browser Desktop versions prior to 1.83.10 that have the split view feature enabled, the "Open Link in Split Vi…
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High 8.8
Azure PlayFab Elevation of Privilege Vulnerability
Azure PlayFab Elevation of Privilege Vulnerability
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Medium 5.3
NamelessMC Vulnerable to Cookie-Based View Count Manipulation
NamelessMC is a free, easy to use & powerful website software for Minecraft servers. In version 2.1.4 and prior, an insecure view count mechanism in the forum page allows an unauthenticated attacker to artificially increase the view count. The application rel…
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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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Critical 9.8
e-Excellence U-Office Force - Improper Authentication
The U-Office Force from e-Excellence has an Improper Authentication vulnerability, allowing unauthenticated remote attackers to use a particular API and alter cookies to log in as an administrator.
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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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Medium 4.1
github.com/gitpod-io/gitpod vulnerable to Cookie Tossing
Versions of the package github.com/gitpod-io/gitpod/components/server/go/pkg/lib before main-gha.27122; versions of the package github.com/gitpod-io/gitpod/components/ws-proxy/pkg/proxy before main-gha.27122; versions of the package github.com/gitpod-io/gitpo…
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Critical 9.8
Cookies Manipulation in Talya Informatics' Elektraweb
Reliance on Cookies without Validation and Integrity Checking vulnerability in Talya Informatics Elektraweb allows Session Credential Falsification through Manipulation, Accessing/Intercepting/Modifying HTTP Cookies, Manipulating Opaque Client-based Data Toke…
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Medium 4.3
IBM Cognos Controller information disclosure
IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 does not set the secure attribute on authorization tokens or session cookies. Attackers may be able to get the cookie values by sending a http:// link to a user or by planting this link in a site the user goes …
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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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Critical 9.8
Ruijie RG-NBR700GW 10.3(4b12) router lacks cookie verification when resetting the password, resulting in an administrat…
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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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Medium 6.1
Set-Cookie response headers were being incorrectly honored in multipart HTTP responses. If an attacker could control th…
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Critical 9.6
Leak of zbx_session cookie when using a scheduled report that includes a dashboard with a URL widget.
The website configured in the URL widget will receive a session cookie when testing or executing scheduled reports. The received session cookie can then be used to access the frontend as the particular user.
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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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Critical 10.0
CSRF Token Reuse 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 inject arbitrary values and forge malicious requests on behalf of a user. This vuln…
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Critical 10.0
Socomec MOD3GP-SY-120K Reliance on Cookies without Validation and Integrity Checking
Session management within the web application is incorrect and allows attackers to steal session cookies to perform a multitude of actions that the web app allows on the device.