CVE-2020-4046
In affected versions of WordPress, users with low privileges (like contributors and authors) can use the embed block in a certain way to inject unfiltered HTML in the block editor.
Does this matter?
Lower severity and a low EPSS score (2.13%). Track it; it rarely justifies an emergency change on its own.
Description
In affected versions of WordPress, users with low privileges (like contributors and authors) can use the embed block in a certain way to inject unfiltered HTML in the block editor. When affected posts are viewed by a higher privileged user, this could lead to script execution in the editor/wp-admin. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, 4.0.31, 3.9.32, 3.8.34, 3.7.34).
- CVSS 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 2.13% probability · 82th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-80, CWE-79
- Affected
- wordpress/wordpress · debian/debian linux · fedoraproject/fedora
- Source
- security-advisories@github.com
EPSS 2.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rpwf-hrh2-39jfThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00000.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/773N2ZV7QEMBGKH6FBKI6Q5S3YJMW357/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODNHXVJS25YVWYQHOCICXTLIN5UYJFDN/
- https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-release/Vendor Advisory
- https://www.debian.org/security/2020/dsa-4709Third Party Advisory
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rpwf-hrh2-39jfThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00000.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/773N2ZV7QEMBGKH6FBKI6Q5S3YJMW357/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODNHXVJS25YVWYQHOCICXTLIN5UYJFDN/
- https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-release/Vendor Advisory
- https://www.debian.org/security/2020/dsa-4709Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.