CVE-2018-4300: The session cookie generated by the CUPS web interface was easy to guess on Linux, allowing unauthorized sc...

Security readout for executives and security teams

CVE-2018-4300 is a CUPS web interface weakness on Linux. When the web interface is enabled, its session cookie was easy to guess, which could let unauthorized scripted access reach the interface. The issue affects CUPS versions before 2.2.10. No active exploitation is cited in the provided sources. Exposure is most likely on Linux hosts running CUPS before 2.2.10 where the CUPS web interface is enabled. Systems without the web interface enabled are not described as exposed by the source bundle. The bundle does not identify specific distributions beyond the Debian LTS update reference. Treat this as a moderate hygiene and exposure-reduction item. Prioritize internet-reachable or broadly accessible CUPS web interfaces first, then complete patch verification across Linux print services. The lack of KEV evidence lowers urgency, but weak session cookies on admin interfaces should not remain unresolved. Mitigation focus: Upgrade CUPS to version 2.2.10 or a vendor-provided fixed package.; Check Debian or relevant distribution security advisories for backported fixes.; Disable the CUPS web interface where it is not operationally required..

Prepared

Jun 6, 2026, 21:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.