WordPress Core 4.7.0-6.3.1 - Denial of Service via Cache Poisoning

5.3
Improper Preservation of Consistency Between Independent Representations of Shared State
CVSS 5.3 (Medium)
Publicly Published October 12, 2023
Last Updated February 6, 2024
Researchers s5s
raouf_maklouf

Description

WordPress Core is vulnerable to Denial of Service via Cache Poisoning in versions between 4.7.0 and 6.3.1. In cases where the X-HTTP-Method-Override header was sent in a request to a REST endpoint and the endpoint returned a 4xx error, the error could be cached, resulting in denial of service.

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Vulnerability Details for WordPress

Software Type Core
Patched? Yes
Remediation Update to one of the following versions, or a newer patched version: 4.7.27, 4.8.23, 4.9.24, 5.0.20, 5.1.17, 5.2.19, 5.3.16, 5.4.14, 5.5.13, 5.6.12, 5.7.10, 5.8.8, 5.9.8, 6.0.6, 6.1.4, 6.2.3, 6.3.2
Affected Versions
  • 5.7 - 5.7.9
  • 5.8 - 5.8.7
  • 5.9 - 5.9.7
  • 6.0 - 6.0.5
Expand to see 13 more affected version ranges.
  • 6.1 - 6.1.3
  • 6.2 - 6.2.2
  • 6.3 - 6.3.1
  • 4.7 - 4.7.26
  • 4.8 - 4.8.22
  • 4.9 - 4.9.23
  • 5.0 - 5.0.19
  • 5.1 - 5.1.16
  • 5.2 - 5.2.18
  • 5.3 - 5.3.15
  • 5.4 - 5.4.13
  • 5.5 - 5.5.12
  • 5.6 - 5.6.11
Patched Versions
  • 4.7.27
  • 4.8.23
  • 4.9.24
  • 5.0.20
Expand to see 13 more patched versions.
  • 5.1.17
  • 5.2.19
  • 5.3.16
  • 5.4.14
  • 5.5.13
  • 5.6.12
  • 5.7.10
  • 5.8.8
  • 5.9.8
  • 6.0.6
  • 6.1.4
  • 6.2.3
  • 6.3.2

Recent vulnerabilities in WordPress

# Title CVE ID CVSS Researchers Date
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4 WordPress 6.9 - 6.9.1 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Note Creation via REST API CVE-2026-3906 4.3 kaminuma March 10, 2026
5 WordPress <= 6.9.1 - Authenticated (Author+) XML External Entity Injection via getID3 Library Media Upload 6.5 Youssef Achtatal March 10, 2026
6 WordPress <= 6.9.1 - Authenticated (Administrator+) Stored Cross-Site Scripting via Navigation Menu Items 4.4 sibwtf March 10, 2026
7 WordPress <= 6.9.1 - Unauthenticated Blind Server-Side Request Forgery via XML-RPC Pingback Discovery 5.8 sibwtf March 10, 2026
8 WordPress <= 6.9.1 - Cross-Site Scripting via Client-Side Template Override in Admin Area 4.4 Asaf Mozes March 10, 2026
9 WordPress <= 6.8.2 - Authenticated (Contributor+) Sensitive Information Exposure CVE-2025-58246 4.3 Abu Hurayra (HurayraIIT) September 22, 2025
10 WordPress <= 6.8.2 - Authenticated (Author+) Stored Cross-Site Scripting CVE-2025-58674 6.4 SavPhill (Savphill) September 22, 2025

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