What is CVE-2018-4300?

CVE-2018-4300 is a medium-severity vulnerability in Apple Cups, classified under Information Disclosure. CVSS score: 5.9/10. Published 2019-04-03.

How severe is CVE-2018-4300?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Information disclosure in Apple Cups

CVE-2018-4300

The session cookie generated by the CUPS web interface was easy to guess on Linux, allowing unauthorized scripted access to the web interface when the web interface is enabled. This issue affected versions prior to v2.2.10.

Vulnerability class: Information Disclosure

Published 2019-04-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.018 (78.2th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Apple Cups
Cups — versions Versions prior to: v2.2.10

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

github.com/apple/cups/releases/tag/v2.2.10 (Third Party Advisory, Release Notes)
www.securityfocus.com/bid/107785 (Third Party Advisory, vdb-entry)
lists.debian.org/debian-lts-announce/2019/09/msg00028.html (mailing-list)

Frequently asked questions

What is CVE-2018-4300?: CVE-2018-4300 is a medium-severity vulnerability in Apple Cups, classified under Information Disclosure. CVSS score: 5.9/10. Published 2019-04-03.
How severe is CVE-2018-4300?: Medium severity. CVSS v3 base score is 5.9 out of 10.