CVE-2018-4300 — cups: Session cookie generated by the CUPS web interface is easy to guess

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HIGH

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

Published Apr 3, 2019

7.3

HIGH

CVSS 3.0

EPSS 1.84%

Description

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.

Affected products

Vendor n/a Product CUPS Default
n/a
- Version
  Versions prior to: v2.2.10
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

n/a

CUPS

n/a

Version	Status	Constraints
Versions prior to: v2.2.10	affected	-

Red Hat Enterprise Linux 7

cups-1:1.6.3-43.el7

Fixed · RHSA-2020:1050
Red Hat Enterprise Linux 5

cups

Will not fix
Red Hat Enterprise Linux 6

cups

Will not fix
Red Hat Enterprise Linux 8

cups

Not affected
Red Hat Virtualization 4

redhat-virtualization-host

Not affected

Product	Package	State	Advisory
Red Hat Enterprise Linux 7	cups-1:1.6.3-43.el7	Fixed	RHSA-2020:1050
Red Hat Enterprise Linux 5	cups	Will not fix	n/a
Red Hat Enterprise Linux 6	cups	Will not fix	n/a
Red Hat Enterprise Linux 8	cups	Not affected	n/a
Red Hat Virtualization 4	redhat-virtualization-host	Not affected	n/a

Remediation

Red Hat statement

This vulnerability was originally assigned CVE-2018-4700, but after the publication of security errata the identifier was changed to CVE-2018-4300. Both identifiers refer to the same vulnerability. Since some sources use CVE-2018-4700 and others use CVE-2018-4300, Red Hat security advisories for this vulnerability have been amended to include both identifiers.

Metrics

1.84% 0.01841

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01841

Score over time

2021–2026

EPSS v1
EPSS v2
EPSS v3
EPSS v5

Percentile over time

EPSS v1
EPSS v2
EPSS v3
EPSS v5

Table of values (11 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.84% (0.01841)	78.22th	v5 (v2026.06.15)
Jun 15, 2026	1.84% (0.01841)	76.15th	v5 (v2026.06.15)
Jul 20, 2024	0.15% (0.00153)	51.99th	v3 (v2023.03.01)
Mar 27, 2024	0.15% (0.00153)	50.64th	v3 (v2023.03.01)
Mar 7, 2023	0.17% (0.00166)	51.48th	v3 (v2023.03.01)
Mar 6, 2023	0.95% (0.00954)	36.37th	v2 (v2022.01.01)
Sep 2, 2022	0.95% (0.00954)	34.50th	v2 (v2022.01.01)
Apr 1, 2022	0.95% (0.00954)	32.50th	v2 (v2022.01.01)
Feb 4, 2022	0.95% (0.00954)	16.28th	v2 (v2022.01.01)
Feb 3, 2022	0.13% (0.00130)	0.44th	v1
Apr 14, 2021	0.13% (0.00130)	0.00th	v1

Weaknesses (2)

CWE-200

Exposure of Sensitive Information

CWE-330

Insufficient Randomness

References (7)

http://www.securityfocus.com/bid/107785
vdb-entryx_refsource_BIDThird Party Advisory
https://access.redhat.com/security/cve/CVE-2018-4300
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1695929
Issue Tracking
https://github.com/apple/cups/releases/tag/v2.2.10
x_refsource_MISCRelease NotesThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00028.html
mailing-listx_refsource_MLIST
https://nvd.nist.gov/vuln/detail/CVE-2018-4300
https://www.cve.org/CVERecord?id=CVE-2018-4300

Link	Providers	Tags
http://www.securityfocus.com/bid/107785		vdb-entryx_refsource_BIDThird Party Advisory
https://access.redhat.com/security/cve/CVE-2018-4300		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1695929		Issue Tracking
https://github.com/apple/cups/releases/tag/v2.2.10		x_refsource_MISCRelease NotesThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00028.html		mailing-listx_refsource_MLIST
https://nvd.nist.gov/vuln/detail/CVE-2018-4300
https://www.cve.org/CVERecord?id=CVE-2018-4300