Vulnerabilities

Jenkins weekly releases 2.579 and earlier and LTS releases 2.568.2 and earlier allow remote code execution because user-submitted `config.xml` documents can contain nested field values of object types that are marked as storing their configuration in independent top-level configuration files, such as the global configuration and jobs; these objects can then handle HTTP requests through the Stapler request framework. An attacker who can submit such a configuration file, per the CVSS vector a network-based attacker with low (i.e., authenticated, low-privilege) access and no user interaction, gains code execution on the Jenkins controller. All controllers running an affected weekly or LTS release are in scope, particularly where the config.xml endpoint is reachable by lower-privileged users. There is no sign of active exploitation so far: no public proof-of-concept is known, the flaw is not in CISA KEV, and EPSS estimates only a 0.7% probability of exploitation within 30 days.

Do: Upgrade every controller above the vulnerable ranges — a weekly release newer than 2.579 and an LTS release newer than 2.568.2. As an interim mitigation, restrict which users can submit/upload config.xml (limit configuration write access to trusted/administrative accounts) and review controllers for signs of compromise, since exploitation yields code execution. Monitor for suspicious POSTs to config.xml endpoints on controllers that cannot yet be upgraded.

Jenkins 2.575 and earlier, LTS 2.568.1 and earlier handles case-insensitivity in user names and group names inconsistently, allowing attackers able to create new users or groups with names that case-insensitively match other characters to impersonate other users or be granted their permissions in some circumstances.

A missing permission check in Jenkins Zowe zDevOps Plugin 1.1.3.50.ve350c9b_450b_1 and earlier allows attackers with Overall/Read permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.

Jenkins Assembla Plugin 1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks, allowing attackers able to control the responses of the configured Assembla server to extract secrets from the Jenkins controller or perform server-side request forgery.

Jenkins FitNesse Plugin 1.36 and earlier stores passwords unencrypted in job config.xml files on the Jenkins controller, where they can be viewed by users with Extended Read permission or access to the Jenkins controller file system.

Jenkins OWASP ZAP Plugin 1.0.7 and earlier performs build operations on the Jenkins controller rather than the assigned agent, allowing attackers with Item/Configure permission to execute arbitrary code on the Jenkins controller.

A missing permission check in Jenkins MCP Server Plugin 0.177.v629fdb_2557fe and earlier allows attackers with Item/Read permission to read the Pipeline replay scripts of jobs they can access.

Missing permission checks in Jenkins Contrast Continuous Application Security Plugin 3.11 and earlier allow attackers with Overall/Read permission to enumerate the names of configured Contrast metadata.

A missing permission check in Jenkins EC2 Fleet Plugin 4.2.3.539.v8fedff2a_81c3 and earlier allows attackers with Overall/Read permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing AWS credentials stored in Jenkins.

A cross-site request forgery (CSRF) vulnerability in Jenkins Priority Sorter Plugin 936.v2c01c6b_84449 and earlier allows attackers to overwrite the global job priority configuration.

Jenkins Bitbucket Push and Pull Request Plugin 3.3.8 and earlier unconditionally disables SSL/TLS certificate and hostname validation for connections sending Bearer token authenticated requests to the configured Bitbucket Server endpoint, allowing attackers able to intercept network traffic to capture the token.

Jenkins Active Directory Plugin 2.41.1 and earlier does not escape the user name before building the LDAP search filter in the Windows native (ADSI) authentication path, allowing unauthenticated attackers to inject LDAP wildcard characters to enumerate directory entries and to authenticate as a matching user whose password they know without knowing their exact user name.

Jenkins Job Configuration History Plugin 1356.ve360da_6c523a_ and earlier does not redact the encrypted values of secrets when displaying historical job and agent configurations, allowing attackers with Extended Read permission to view encrypted secret values that would otherwise be redacted.

A missing permission check in Jenkins Git Parameter Plugin 462.vdcf3df2ed2ca_ and earlier allows attackers with Item/Read permission to obtain information about the SCM repository used by a job, such as branch names, tag names, and revision metadata.

A missing permission check in Jenkins GitHub Branch Source Plugin 1967.1969.v205fd594c821 and earlier allows attackers with Overall/Read permission to obtain the URLs of GitHub Enterprise servers configured in the global plugin configuration.

Jenkins Pipeline: Groovy Plugin 4331.v9d06ed4658ff and earlier does not restrict the types that can be instantiated through the Pipeline Snippet Generator, allowing attackers to instantiate types related to job or system configuration other than Pipeline steps.

Jenkins Git client Plugin 6.6.0 and earlier does not correctly escape the workspace directory name when it is embedded into a generated SSH wrapper script, allowing attackers able to control the name of a build's working directory to execute arbitrary operating system commands on the agent.

Jenkins Script Security Plugin 1402.v94c9ce464861 and earlier does not intercept the implicit type casts applied to the elements of typed for-each loops in sandboxed Groovy scripts, allowing attackers able to provide such scripts to invoke arbitrary constructors and bypass the sandbox protection.

Jenkins weekly releases through 2.567 and LTS releases through 2.555.2 deserialize arbitrary Java types defined in Jenkins core or plugins when processing an attacker-controlled config.xml submission (CWE-502, deserialization of untrusted data). An attacker with low-level privileges who can submit a crafted config.xml causes deserialized objects to handle subsequent HTTP requests, letting the attacker impersonate any user and send requests on that user's behalf. This can be escalated to full compromise, including running arbitrary code via the Script Console or reading arbitrary files from the Jenkins controller, consistent with the high severity (CVSS 8.8) and high ratings for confidentiality, integrity, and availability. Any organization running an affected Jenkins weekly or LTS release is exposed, although the attacker must have at least some valid low-level access to the controller to trigger the flaw. No public proof-of-concept or confirmed in-the-wild exploitation is known yet, but EPSS assigns a 53.1% probability of exploitation within 30 days (99th percentile), signaling a high risk of imminent exploit activity.

Do: Upgrade all controllers to a Jenkins weekly release later than 2.567 or an LTS release later than 2.555.2 as soon as the fix is available. Until patched, restrict which accounts can create or configure jobs and submit config.xml, and review Script Console permissions, since those amplify the impact. Prioritize internet-exposed controllers given the elevated EPSS score, and monitor logs for unexpected privileged HTTP requests or unusual config.xml submissions.

A cross-site request forgery (CSRF) vulnerability in Jenkins Multijob Plugin 662.vd2e0001f6b_b_d and earlier allows attackers to resume failed Multijob builds.

Jenkins buildgraph-view Plugin 1.8 and earlier does not escape the build URL, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to configure jobs or views.

Jenkins Job Import Plugin 143.v044a_2e819b_27 and earlier does not perform a permission check in an HTTP endpoint, allowing attackers with Overall/Read permission to enumerate credentials IDs of credentials stored in Jenkins.

Jenkins Bitbucket OAuth Plugin 0.17 and earlier does not restrict the redirect URL after login, allowing attackers to perform phishing attacks.

Jenkins AppSpider Plugin 1.0.17 and earlier does not perform a permission check in a method implementing form validation, allowing attackers with Overall/Read permission to connect to an attacker-specified URL.