WordPress wordpress core

WordPress <= 6.9.1 — Unauthenticated Blind Server-Side Request Forgery via XML-RPC Pingback Discovery

4d4301ca-081b-4fa3-ac4f-aa8f0b37d32cPublished Mar 10, 2026 · Updated Nov 13, 2026

Affected: ≤6.9.1Update to 6.8.4 or 6.9.2 or newer

Fixed versions are per release branch: update to the fix for the branch you run.

All remediation steps

Watch core

Medium5.8CVSS 3.15.8CISA KEVNot listedAccessNo account needed

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Overview

Advisory ID: 4d4301ca-081b-4fa3-ac4f-aa8f0b37d32c
Product: WordPress wordpress
Affected: ≤6.9.1
Fixed in: 6.8.4, 6.9.2
Weakness: CWE-918 SSRF
Required access: No account needed
Published: Mar 10, 2026 · updated Nov 13, 2026
Credit: sibwtf

Affected≤ 6.9.1
Patched in6.8.4 / 6.9.2

5.8

CVSS 3.1 · CNA (Wordfence)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

What does this vector mean?

AV:N Attack vector: Network
AC:L Attack complexity: Low
PR:N Privileges required: None
UI:N User interaction: None
S:C Scope: Changed
C:N Confidentiality: None
I:L Integrity: Low
A:N Availability: None

WordPress core is vulnerable to Blind Server-Side Request Forgery in all versions up to and including 6.9.1. This is due to the WP_HTTP_IXR_Client class using wp_remote_post() instead of the safer wp_safe_remote_post() when making outgoing XML-RPC pingback requests.

This makes it possible for unauthenticated attackers to make web requests to arbitrary internal locations originating from the WordPress server, which can be used to query and modify information from internal services.

Not sure which version you run? Run a passive check — it reads public files only.

Remediation & mitigations

Update to one of the following versions, or a newer patched version: 6.8.4, 6.9.2
Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.

References & provenance

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

Advisorywordfence.com

Timeline

Mar 10, 2026
CVE published
Severity medium, CVSS 5.8
Nov 13, 2026
Record last updated

Sources & licenses

Vulnerability data: Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVSS / CWE: National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.

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