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TI-2020-03535 Aliases CVE-2020-4046

Authenticated XSS through embed block in WordPress

Priority LOW 29CWE-80Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-80.

Summary

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).

Why it matters now

EPSS 0.02127 82nd percentileScored 2026-11-07
Fix Fixed wordpress-develop (WordPress): 5.4.2, 5.3.4, 5.2.7 +15

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
WordPresswordpress-develop5.4.0 to before 5.4.2; 5.3.0 to before 5.3.4; 5.2.0 to before 5.2.7; 5.1.0 to before 5.1.6; 5.0.0 to before 5.0.10; 4.9.0 to before 4.9.15; 4.8.0 to before 4.8.14; 4.7.0 to before 4.7.18; 4.6.0 to before 4.6.19; 4.5.0 to before 4.5.22; 4.4.0 to before 4.4.23; 4.3.0 to before 4.3.24; 4.2.0 to before 4.2.28; 4.1.0 to before 4.1.31; 4.0.0 to before 4.0.31; 3.9.0 to before 3.9.32; 3.8.0 to before 3.8.34; 3.7.0 to before 3.7.345.4.2, 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, 3.7.34Patch availableCNA
  • wordpress-develop VendorWordPress Affected 5.4.0 to before 5.4.2; 5.3.0 to before 5.3.4; 5.2.0 to before 5.2.7; 5.1.0 to before 5.1.6; 5.0.0 to before 5.0.10; 4.9.0 to before 4.9.15; 4.8.0 to before 4.8.14; 4.7.0 to before 4.7.18; 4.6.0 to before 4.6.19; 4.5.0 to before 4.5.22; 4.4.0 to before 4.4.23; 4.3.0 to before 4.3.24; 4.2.0 to before 4.2.28; 4.1.0 to before 4.1.31; 4.0.0 to before 4.0.31; 3.9.0 to before 3.9.32; 3.8.0 to before 3.8.34; 3.7.0 to before 3.7.34 Fixed in 5.4.2, 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 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*3.7 to before 3.7.34; 3.8 to before 3.8.34; 3.9 to before 3.9.32; 4.0 to before 4.0.31; 4.1 to before 4.1.31; 4.2 to before 4.2.28; 4.3 to before 4.3.24; 4.4 to before 4.4.23; 4.5 to before 4.5.22; 4.6 to before 4.6.19; 4.7 to before 4.7.18; 4.8 to before 4.8.14; 4.9 to before 4.9.15; 5.0 to before 5.0.10; 5.1 to before 5.1.6; 5.2 to before 5.2.7; 5.3.0 to before 5.3.4; 5.4 to before 5.4.2VulnerableWordPress
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
  • cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:* Versions 3.7 to before 3.7.34; 3.8 to before 3.8.34; 3.9 to before 3.9.32; 4.0 to before 4.0.31; 4.1 to before 4.1.31; 4.2 to before 4.2.28; 4.3 to before 4.3.24; 4.4 to before 4.4.23; 4.5 to before 4.5.22; 4.6 to before 4.6.19; 4.7 to before 4.7.18; 4.8 to before 4.8.14; 4.9 to before 4.9.15; 5.0 to before 5.0.10; 5.1 to before 5.1.6; 5.2 to before 5.2.7; 5.3.0 to before 5.3.4; 5.4 to before 5.4.2 Vulnerable ·WordPress
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject

Remediation

  • Fix · CNA wordpress-develop (WordPress) Fixed in 5.4.2, 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

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    wordpress-develop — FEDORA-2020-bbedd29391

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2020-03536 Authenticated XSS via media attachment page in WordPressPriority LOW 36
    • TI-2020-03537 Open redirect in wp_validate_redirect() in WordPressPriority LOW 30
    • TI-2020-03539 set-screen-option filter misuse by plugins leading to privilege escalation in WordPressPriority LOW 20
    Show all 5 records → Advisory →
  • Advisory ·

    wordpress-develop — FEDORA-2020-8447a3e195

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2020-03536 Authenticated XSS via media attachment page in WordPressPriority LOW 36
    • TI-2020-03537 Open redirect in wp_validate_redirect() in WordPressPriority LOW 30
    • TI-2020-03539 set-screen-option filter misuse by plugins leading to privilege escalation in WordPressPriority LOW 20
    Show all 5 records → Advisory →
Show 1 more group
  • Advisory ·

    wordpress-develop — DSA-4709

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2020-03536 Authenticated XSS via media attachment page in WordPressPriority LOW 36
    • TI-2020-03537 Open redirect in wp_validate_redirect() in WordPressPriority LOW 30
    • TI-2020-03539 set-screen-option filter misuse by plugins leading to privilege escalation in WordPressPriority LOW 20
    Show all 5 records → Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-4046

References

Advisory 6

  • TI-2026-45010 WordPress < 7.0.2 - REST API batch-route confusion and SQL injection issue leading to Remote Code Execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2016-08118 The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-83466 Predictable staging paths let attackers run code in WordPress Core KEVCVSS 3.1HIGH 8.1
  • TI-2026-59973 An unauthenticated attacker can make `get_page_template()` page-template resolution… KEVCVSS 3.1HIGH 8.1
  • TI-2016-08129 The isMail transport in PHPMailer before 5.2.20 might allow remote attackers to pass… CVSS 3.1CRITICAL 9.8
  • TI-2026-42844 WordPress < 7.0.2 - Facilitated SQL Injection via author__not_in in WP_Query KEVCVSS 3.1MEDIUM 5.9
See all 356 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences