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TI-2020-08900 Aliases CVE-2020-11026

Specially crafted filenames in WordPress leading to XSS

Priority MEDIUM 42CWE-707Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).

Why it matters now

EPSS 0.02092 81st percentileScored 2026-11-07
Fix Fixed WordPress (WordPress): 5.4.1, 5.3.3, 5.2.6 +15

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
WordPressWordPress5.4.0 to before 5.4.1; 5.3.0 to before 5.3.3; 5.2.0 to before 5.2.6; 5.1.0 to before 5.1.5; 5.0.0 to before 5.0.9; 4.9.0 to before 4.9.14; 4.8.0 to before 4.8.13; 4.7.0 to before 4.7.17; 4.6.0 to before 4.6.18; 4.5.0 to before 4.5.21; 4.4.0 to before 4.4.22; 4.3.0 to before 4.3.23; 4.2.0 to before 4.2.27; 4.1.0 to before 4.1.30; 4.0.0 to before 4.0.30; 3.9.0 to before 3.9.31; 3.8.0 to before 3.8.33; 3.7.0 to before 3.7.335.4.1, 5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33Patch availableCNA
  • WordPress VendorWordPress Affected 5.4.0 to before 5.4.1; 5.3.0 to before 5.3.3; 5.2.0 to before 5.2.6; 5.1.0 to before 5.1.5; 5.0.0 to before 5.0.9; 4.9.0 to before 4.9.14; 4.8.0 to before 4.8.13; 4.7.0 to before 4.7.17; 4.6.0 to before 4.6.18; 4.5.0 to before 4.5.21; 4.4.0 to before 4.4.22; 4.3.0 to before 4.3.23; 4.2.0 to before 4.2.27; 4.1.0 to before 4.1.30; 4.0.0 to before 4.0.30; 3.9.0 to before 3.9.31; 3.8.0 to before 3.8.33; 3.7.0 to before 3.7.33 Fixed in 5.4.1, 5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*3.7 to before 3.7.33; 3.8 to before 3.8.33; 3.9 to before 3.9.31; 4.0 to before 4.0.30; 4.1 to before 4.1.30; 4.2 to before 4.2.27; 4.3 to before 4.3.23; 4.4 to before 4.4.22; 4.5 to before 4.5.21; 4.6 to before 4.6.18; 4.7 to before 4.7.17; 4.8 to before 4.8.13; 4.9 to before 4.9.14; 5.0 to before 5.0.9; 5.1 to before 5.1.5; 5.2 to before 5.2.6; 5.3 to before 5.3.3VulnerableWordPress
cpe:2.3:a:wordpress:wordpress:5.4:*:*:*:*:*:*:*5.4VulnerableWordPress
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:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:* Versions 3.7 to before 3.7.33; 3.8 to before 3.8.33; 3.9 to before 3.9.31; 4.0 to before 4.0.30; 4.1 to before 4.1.30; 4.2 to before 4.2.27; 4.3 to before 4.3.23; 4.4 to before 4.4.22; 4.5 to before 4.5.21; 4.6 to before 4.6.18; 4.7 to before 4.7.17; 4.8 to before 4.8.13; 4.9 to before 4.9.14; 5.0 to before 5.0.9; 5.1 to before 5.1.5; 5.2 to before 5.2.6; 5.3 to before 5.3.3 Vulnerable ·WordPress
  • cpe:2.3:a:wordpress:wordpress:5.4:*:*:*:*:*:*:* Versions 5.4 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:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · CNA WordPress (WordPress) Fixed in 5.4.1, 5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33

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-2020-11026

References

Advisory 4

  • 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