Lockable Resources Plugin 2.8 and earlier does not require POST requests for several HTTP endpoints, resulting in a cross-site request forgery (CSRF) vulnerability. This vulnerability allows attackers to reserve, unreserve, unlock, and reset resources. Lockable Resources Plugin 2.9 requires POST requests for the affected HTTP endpoints.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-2281
• https://www.jenkins.io/security/advisory/2020-09-23/#SECURITY-1958
• http://www.openwall.com/lists/oss-security/2020/09/23/1
• jenkinsci/lockable-resources-plugin@50ab824