[org.jenkins-ci.main:jenkins-core] Improper Authorization in Jenkins

When creating temporary files, agent-to-controller access to create those files is only checked after they’ve been created in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-21693
• https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455
• https://github.com/advisories/GHSA-929w-q433-4h9x