Metadata Overwrite Vulnerability in Rank Math SEO Plugin for WordPress
CVE-2026-77788

4.9MEDIUM

Key Information:

Vendor

WordPress
Status
Rank Math Seo
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-77788?

The Rank Math SEO plugin for WordPress prior to version 1.0.277 contains a vulnerability that fails to properly validate the ownership of metadata updates. This oversight allows users with the Author role or higher to overwrite arbitrary metadata for posts and users, potentially affecting even higher-privileged user accounts. This vulnerability could be exploited to manipulate data visibility or alter user information within the WordPress environment.

Affected Version(s)

Rank Math SEO 1.0.48 < 1.0.277

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-77788 - Proof of Concept

References

https://wpscan.com/vulnerability/c02511a0-9c8b-44cd-b25f-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
4.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Usama Arshad
WPScan
.