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CVE-2020-4046
Authenticated XSS through embed block in WordPress
Medium5.4EPSS 2.1%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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).
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 2.1% · top 18% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.
Weakness
Affected products
- affected >= 5.4.0, < 5.4.2
- affected >= 5.3.0, < 5.3.4
- affected >= 5.2.0, < 5.2.7
- affected >= 5.1.0, < 5.1.6
- affected >= 5.0.0, < 5.0.10
- affected >= 4.9.0, < 4.9.15
- affected >= 4.8.0, < 4.8.14
- affected >= 4.7.0, < 4.7.18
- affected >= 4.6.0, < 4.6.19
- affected >= 4.5.0, < 4.5.22
- affected >= 4.4.0, < 4.4.23
- affected >= 4.3.0, < 4.3.24
- affected >= 4.2.0, < 4.2.28
- affected >= 4.1.0, < 4.1.31
- affected >= 4.0.0, < 4.0.31
- affected >= 3.9.0, < 3.9.32
- affected >= 3.8.0, < 3.8.34
- affected >= 3.7.0, < 3.7.34
References (6)
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rpwf-hrh2-39jf (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-release/ (opens in a new tab)x_refsource_MISCx_transferred
- FEDORA-2020-8447a3e195 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2020-bbedd29391 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- DSA-4709 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- [debian-lts-announce] 20200701 [SECURITY] [DLA 2269-1] wordpress security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-4046)Record last updated .