This advisory announces multiple security vulnerabilities that were found in Jenkins core.
In some places, Jenkins XML API uses XStream to deserialize arbitrary content, which is affected by CVE-2013-7285 reported against XStream. This allows malicious users of Jenkins with a limited set of permissions to execute arbitrary code inside Jenkins master.
SECURITY-76 & SECURITY-88 / CVE-2013-5573
Restrictions of HTML tags for user-editable contents are too lax. This allows malicious users of Jenkins to trick other unsuspecting users into providing sensitive information.
Plugging a hole in the earlier fix to SECURITY-55. Under some circimstances, a malicious user of Jenkins can configure job X to trigger another job Y that the user has no access to.
CLI job creation had a directory traversal vulnerability. This allows a malicious user of Jenkins with a limited set of permissions to overwrite files in the Jenkins master and escalate privileges.
The embedded Winstone servlet container is susceptive to session hijacking attack.
The password input control in the password parameter definition in the Jenkins UI was serving the actual value of the password in HTML, not an encrypted one. If a sensitive value is set as the default value of such a parameter definition, it can be exposed to unintended audience.
Deleting the user was not invalidating the API token, allowing users to access Jenkins when they shouldn't be allowed to do so.
Jenkins UI was vulnerable to click jacking attacks.
"Jenkins' own user database" was revealing the presence/absence of users when login attempts fail.
Jenkins had a cross-site scripting vulnerability in one of its cookies. If Jenkins is deployed in an environment that allows an attacker to override Jenkins cookies in victim's browser, this vulnerability can be exploited.
Jenkins was vulnerable to session fixation attack. If Jenkins is deployed in an environment that allows an attacker to override Jenkins cookies in victim's browser, this vulnerability can be exploited.
Stored XSS vulnerability. A malicious user of Jenkins with a certain set of permissions can cause Jenkins to store arbitrary HTML fragment.
Some of the system diagnostic functionalities were checking a lesser permission than it should have. In a very limited circumstances, this can cause an attacker to gain information that he shouldn't have access to.