CVE-2018-20150

In WordPress before 4.9.9 and 5.x before 5.0.1, crafted URLs could trigger XSS for certain use...

6.1 MediumFix available

In WordPress before 4.9.9 and 5.x before 5.0.1, crafted URLs could trigger XSS for certain use cases involving plugins.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

4.25%Up 2.2 points since Apr 14, 2021

What each source reports

NVD Score used 6.1

In WordPress before 4.9.9 and 5.x before 5.0.1, crafted URLs could trigger XSS for certain use cases involving plugins.

Record: CVE-2018-20150
CVSS 3.0: 6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

CVE List No score

In WordPress before 4.9.9 and 5.x before 5.0.1, crafted URLs could trigger XSS for certain use cases involving plugins.

Record: CVE-2018-20150
Updated: 2026-11-02

EUVDEUVD-2018-12719 No score

In WordPress before 4.9.9 and 5.x before 5.0.1, crafted URLs could trigger XSS for certain use cases involving plugins.

Record: EUVD-2018-12719
Updated: 2026-11-03

GitHub AdvisoriesGHSA-f844-ppv9-vxhv 6.1

In WordPress before 4.9.9 and 5.x before 5.0.1, crafted URLs could trigger XSS for certain use...

In WordPress before 4.9.9 and 5.x before 5.0.1, crafted URLs could trigger XSS for certain use cases involving plugins.

Record: GHSA-f844-ppv9-vxhv
CVSS 3.0: 6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV 6.1

In WordPress before 4.9.9 and 5.x before 5.0.1, crafted URLs could trigger XSS for certain use cases involving plugins.

Record: CVE-2018-20150
CVSS 3.0: 6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-20150 6.1

In WordPress before 4.9.9 and 5.x before 5.0.1, crafted URLs could trigger XSS for certain use cases involving plugins.

Record: DEBIAN-CVE-2018-20150
CVSS 3.0: 6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-20150 6.1

In WordPress before 4.9.9 and 5.x before 5.0.1, crafted URLs could trigger XSS for certain use cases involving plugins.

Record: UBUNTU-CVE-2018-20150
CVSS 3.0: 6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`wordpress` Debian:12	before 5.0.1+dfsg1-1	5.0.1+dfsg1-1
`wordpress` Debian:13	before 5.0.1+dfsg1-1	5.0.1+dfsg1-1
`wordpress` Debian:14	before 5.0.1+dfsg1-1	5.0.1+dfsg1-1
`wordpress` Debian:8	before 4.1.25+dfsg-1+deb8u1, plus listed versions 4.1+dfsg-14.1+dfsg-1+deb8u14.1+dfsg-1+deb8u104.1+dfsg-1+deb8u114.1+dfsg-1+deb8u12 Show 15 moreShow less 4.1+dfsg-1+deb8u134.1+dfsg-1+deb8u144.1+dfsg-1+deb8u154.1+dfsg-1+deb8u164.1+dfsg-1+deb8u174.1+dfsg-1+deb8u184.1+dfsg-1+deb8u24.1+dfsg-1+deb8u34.1+dfsg-1+deb8u44.1+dfsg-1+deb8u54.1+dfsg-1+deb8u64.1+dfsg-1+deb8u74.1+dfsg-1+deb8u84.1+dfsg-1+deb8u94.1.1+dfsg-1	4.1.25+dfsg-1+deb8u1
`wordpress` Debian:9	before 4.7.5+dfsg-2+deb9u5, plus listed versions 4.7.5+dfsg-24.7.5+dfsg-2+deb9u14.7.5+dfsg-2+deb9u1~bpo8+14.7.5+dfsg-2+deb9u24.7.5+dfsg-2+deb9u2~bpo8+14.7.5+dfsg-2+deb9u34.7.5+dfsg-2+deb9u4	4.7.5+dfsg-2+deb9u5
`wordpress` Ubuntu:16.04:LTS	All versions, plus listed versions 4.3+dfsg-14.3.1+dfsg-14.4+dfsg-14.4.1+dfsg-14.4.2+dfsg-14.4.2+dfsg-1ubuntu1	None known
`wordpress` Ubuntu:18.04:LTS	All versions, plus listed versions 4.8.2+dfsg-24.8.3+dfsg-14.9.1+dfsg-14.9.2+dfsg-14.9.4+dfsg-14.9.5+dfsg1-1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-20150 is a medium vulnerability (CVSS 6.1) in Wordpress, published December 14, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.25%, the 91st percentile. Fixed in wordpress 5.0.1+dfsg1-1.

References

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