Jenkins 2.218 and earlier, LTS 2.204.1 and earlier did not use a constant-time comparison function for validating connection secrets, which could potentially allow an attacker to use a timing attack to obtain this secret.

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier used a non-constant time comparison function when validating an HMAC.

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier was vulnerable to a UDP amplification reflection denial of service attack on port 33848.

Jenkins 2.213 and earlier, LTS 2.204.1 and earlier improperly reuses encryption key parameters in the Inbound TCP Agent Protocol/3, allowing unauthorized attackers with knowledge of agent names to obtain the connection secrets for those agents, which can be used to connect to Jenkins, impersonating those agents.

XML external entity (XXE) vulnerability in CloudBees Jenkins before 1.600 and LTS before 1.596.1 allows remote attackers to read arbitrary XML files via a crafted XML document.

XML external entity (XXE) vulnerability in CloudBees Jenkins before 1.600 and LTS before 1.596.1 allows remote attackers to read arbitrary XML files via an XPath query.

Jenkins 2.196 and earlier, LTS 2.176.3 and earlier printed the value of the "Cookie" HTTP request header on the /whoAmI/ URL, allowing attackers exploiting another XSS vulnerability to obtain the HTTP session cookie despite it being marked HttpOnly.

Jenkins 2.196 and earlier, LTS 2.176.3 and earlier did not escape the reason why a queue items is blcoked in tooltips, resulting in a stored XSS vulnerability exploitable by users able to control parts of the reason a queue item is blocked, such as label expressions not matching any idle executors.

Jenkins 2.196 and earlier, LTS 2.176.3 and earlier did not restrict or filter values set as Jenkins URL in the global configuration, resulting in a stored XSS vulnerability exploitable by attackers with Overall/Administer permission.

In Jenkins 2.196 and earlier, LTS 2.176.3 and earlier, the f:expandableTextBox form control interpreted its content as HTML when expanded, resulting in a stored XSS vulnerability exploitable by users with permission to define its contents (typically Job/Configure).

In Jenkins 2.196 and earlier, LTS 2.176.3 and earlier, the f:combobox form control interpreted its item labels as HTML, resulting in a stored XSS vulnerability exploitable by users with permission to define its contents.

Jenkins 2.196 and earlier, LTS 2.176.3 and earlier did not escape the SCM tag name on the tooltip for SCM tag actions, resulting in a stored XSS vulnerability exploitable by users able to control SCM tag names for these actions.

Jenkins 2.191 and earlier, LTS 2.176.2 and earlier allowed users to obtain CSRF tokens without an associated web session ID, resulting in CSRF tokens that did not expire and could be used to bypass CSRF protection for the anonymous user.

A stored cross-site scripting vulnerability in Jenkins 2.191 and earlier, LTS 2.176.2 and earlier allowed attackers with Overall/Administer permission to configure the update site URL to inject arbitrary HTML and JavaScript in update center web pages.

Jenkins Credentials Binding Plugin Jenkins 1.17 is affected by: CWE-257: Storing Passwords in a Recoverable Format. The impact is: Authenticated users can recover credentials. The component is: config-variables.jelly line #30 (passwordVariable). The attack vector is: Attacker creates and executes a Jenkins job.

A vulnerability in the Stapler web framework used in Jenkins 2.185 and earlier, LTS 2.176.1 and earlier allowed attackers to access view fragments directly, bypassing permission checks and possibly obtain sensitive information.

A path traversal vulnerability in Jenkins 2.185 and earlier, LTS 2.176.1 and earlier in core/src/main/java/hudson/model/FileParameterValue.java allowed attackers with Job/Configure permission to define a file parameter with a file name outside the intended directory, resulting in an arbitrary file write on the Jenkins master when scheduling a build.

CSRF tokens in Jenkins 2.185 and earlier, LTS 2.176.1 and earlier did not expire, thereby allowing attackers able to obtain them to bypass CSRF protection.

The f:validateButton form control for the Jenkins UI did not properly escape job URLs in Jenkins 2.171 and earlier and Jenkins LTS 2.164.1 and earlier, resulting in a cross-site scripting (XSS) vulnerability exploitable by users with the ability to control job names.

Users who cached their CLI authentication before Jenkins was updated to 2.150.2 and newer, or 2.160 and newer, would remain authenticated in Jenkins 2.171 and earlier and Jenkins LTS 2.164.1 and earlier, because the fix for CVE-2019-1003004 in these releases did not reject existing remoting-based CLI authentication caches.

An improper authorization vulnerability exists in Jenkins 2.158 and earlier, LTS 2.150.1 and earlier in core/src/main/java/hudson/security/TokenBasedRememberMeServices2.java that allows attackers with Overall/RunScripts permission to craft Remember Me cookies that would never expire, allowing e.g. to persist access to temporarily compromised user accounts.

An improper authorization vulnerability exists in Jenkins 2.158 and earlier, LTS 2.150.1 and earlier in core/src/main/java/hudson/security/AuthenticationProcessingFilter2.java that allows attackers to extend the duration of active HTTP sessions indefinitely even though the user account may have been deleted in the mean time.

Jenkins versions 2.56 and earlier as well as 2.46.1 LTS and earlier are vulnerable to an unauthenticated remote code execution. An unauthenticated remote code execution vulnerability allowed attackers to transfer a serialized Java `SignedObject` object to the Jenkins CLI, that would be deserialized using a new `ObjectInputStream`, bypassing the existing blacklist-based protection mechanism. We're fixing this issue by adding `SignedObject` to the blacklist. We're also backporting the new HTTP CLI protocol from Jenkins 2.54 to LTS 2.46.2, and deprecating the remoting-based (i.e. Java serialization) CLI protocol, disabling it by default.