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Fencer Vulns
medium 5.9

CVE-2018-4300 json

The session cookie generated by the CUPS web interface was easy to guess on Linux, allowing unauthorized scripted access to the web interfa…

published 2019-04-03 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16086

cvss
5.9
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

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.

Patch / fix

  • apple cups 2.2.10
  • cups Debian 14, Debian 13, Debian 12 2.2.10-1

debian advisories DEBIAN-CVE-2018-4300

  • cups Ubuntu 14.04 LTS 1.7.2-0ubuntu1.11
  • cups Ubuntu 16.04 LTS 2.1.3-4ubuntu0.6
  • cups Ubuntu 18.04 LTS 2.2.7-1ubuntu2.2

ubuntu advisories UBUNTU-CVE-2018-4300

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • cups RHEL 7 1:1.6.3-43.el7
  • cups-lpd RHEL 7 1:1.6.3-43.el7
  • cups-libs RHEL 7 1:1.6.3-43.el7
  • cups-client RHEL 7 1:1.6.3-43.el7
  • cups-ipptool RHEL 7 1:1.6.3-43.el7
  • cups-filesystem RHEL 7 1:1.6.3-43.el7

red hat advisories RHSA-2020:1050

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-4300 updated cvss 7.3

cups: Session cookie generated by the CUPS web interface is easy to guess

  • Red Hat Enterprise Linux 5 cups Red Hat Enterprise Linux 6 cups, cups-lpd, cups-php, cups-libs
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) cups 1.6.3-43.el7, cups-lpd 1.6.3-43.el7, cups-libs 1.6.3-43.el7, cups-client 1.6.3-43.el7, cups-filesystem 1.6.3-43.el7 Red Hat Enterprise Linux Client Optional (v. 7) cups-ipptool 1.6.3-43.el7 Red Hat Enterprise Linux ComputeNode (v. 7) cups 1.6.3-43.el7, cups-lpd 1.6.3-43.el7, cups-libs 1.6.3-43.el7, cups-client 1.6.3-43.el7, cups-filesystem 1.6.3-43.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) cups-ipptool 1.6.3-43.el7 Red Hat Enterprise Linux Server (v. 7) cups 1.6.3-43.el7, cups-lpd 1.6.3-43.el7, cups-libs 1.6.3-43.el7, cups-client 1.6.3-43.el7, cups-filesystem 1.6.3-43.el7 Red Hat Enterprise Linux Server Optional (v. 7) cups-ipptool 1.6.3-43.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) cups 1.6.3-43.el7, cups-lpd 1.6.3-43.el7, cups-libs 1.6.3-43.el7, cups-client 1.6.3-43.el7, cups-filesystem 1.6.3-43.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) cups-ipptool 1.6.3-43.el7
    fixed: vendor fix RHSA-2020:1050
  • Red Hat Enterprise Linux 8 cups, cups-lpd, cups-libs, cups-client, cups-ipptool, cups-filesystem Red Hat Virtualization 4 redhat-virtualization-host-image-update
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.84% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • n/a CUPS

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.