CVE-2020-28040

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

4.3 MediumFix available

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

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: None
Integrity: Low
Availability: None

Exploit likelihood

1.08%Down 0.6 points since Apr 14, 2021

What each source reports

NVD Score used 4.3

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

Record: CVE-2020-28040
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-352
Updated: 2026-11-02

CVE List No score

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

Record: CVE-2020-28040
Updated: 2026-11-02

EUVDEUVD-2020-20531 No score

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

Record: EUVD-2020-20531
Updated: 2026-11-03

GitHub AdvisoriesGHSA-86pg-877h-rfr2 4.3

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

Record: GHSA-86pg-877h-rfr2
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness: CWE-352
Updated: 2026-11-02

OSV 4.3

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

Record: CVE-2020-28040
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-28040 4.3

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

Record: DEBIAN-CVE-2020-28040
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-28040 4.3

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

Record: UBUNTU-CVE-2020-28040
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVBIT-wordpress-2020-28040 No score

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

Record: BIT-wordpress-2020-28040
Updated: 2026-11-02

OSVBIT-wordpress-multisite-2020-28040 No score

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

Record: BIT-wordpress-multisite-2020-28040
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`wordpress` Bitnami	before 5.5.2	5.5.2
`wordpress-multisite` Bitnami	before 5.5.2	5.5.2
`wordpress` Debian:12	before 5.5.3+dfsg1-1	5.5.3+dfsg1-1
`wordpress` Debian:13	before 5.5.3+dfsg1-1	5.5.3+dfsg1-1
`wordpress` Debian:14	before 5.5.3+dfsg1-1	5.5.3+dfsg1-1
`wordpress` Debian:9	before 4.7.19+dfsg-1+deb9u1, plus listed versions 4.7.18+dfsg-1+deb9u14.7.5+dfsg-24.7.5+dfsg-2+deb9u14.7.5+dfsg-2+deb9u1~bpo8+14.7.5+dfsg-2+deb9u2 Show 5 moreShow less 4.7.5+dfsg-2+deb9u2~bpo8+14.7.5+dfsg-2+deb9u34.7.5+dfsg-2+deb9u44.7.5+dfsg-2+deb9u54.7.5+dfsg-2+deb9u6	4.7.19+dfsg-1+deb9u1
`wordpress` Debian:10	before 5.0.11+dfsg1-0+deb10u1, plus listed versions 5.0.10+dfsg1-0+deb10u15.0.4+dfsg1-15.0.4+dfsg1-1+deb10u15.0.4+dfsg1-1+deb10u2	5.0.11+dfsg1-0+deb10u1
`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
`wordpress` Ubuntu:20.04:LTS	All versions, plus listed versions 5.2.2+dfsg1-15.2.4+dfsg1-15.3.2+dfsg1-15.3.2+dfsg1-1ubuntu1	None known

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Affected packages
Package	Affected	Fixed
`wordpress` Ubuntu:22.04:LTS	All versions, plus listed versions 5.7.1+dfsg1-2ubuntu15.8.1+dfsg1-2ubuntu15.8.2+dfsg1-1ubuntu15.8.3+dfsg1-1ubuntu15.8.3+dfsg1-1ubuntu1.1	None known
`wordpress` Ubuntu:24.04:LTS	All versions, plus listed versions 6.2+dfsg1-1ubuntu16.4.3+dfsg1-1ubuntu1	None known
`wordpress` Ubuntu:25.10	All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu1	None known
`wordpress` Ubuntu:26.10	All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu2	None known
`wordpress` Ubuntu:26.04:LTS	All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu16.7.2+dfsg1-1.1ubuntu2	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-2020-28040 is a medium vulnerability (CVSS 4.3) in Wordpress, published October 31, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.08%, the 65th percentile. Fixed in wordpress 5.5.2.

References

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