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TI-2021-19914 Aliases CVE-2021-44223GHSA-m8cv-g4gv-cx2g

WordPress before 5.8 lacks support for the Update URI plugin header.

Priority HIGH 65Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

WordPress before 5.8 lacks support for the Update URI plugin header. This makes it easier for remote attackers to execute arbitrary code via a supply-chain attack against WordPress installations that use any plugin for which the slug satisfies the naming constraints of the WordPress.org Plugin Directory but is not yet present in that directory.

Why it matters now

EPSS 0.28983 98th percentileScored 2026-11-08
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*before 5.8VulnerableWordPress
  • cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:* Versions before 5.8 Vulnerable ·WordPress

Remediation

No fixed version listed by the sources yet.

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-2021-44223
  2. 2026-10-03 Alias added: GHSA-m8cv-g4gv-cx2g

References

Exploit 1

Advisory 1

  • 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