Denial of Service Vulnerability in Seraphinite Accelerator WordPress Plugin
CVE-2026-87828

5.7MEDIUM

Key Information:

Vendor

WordPress
Status
Seraphinite Accelerator
Vendor
CVE Published:
16 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-87828?

The Seraphinite Accelerator plugin for WordPress fails to adequately validate permissions during state-update AJAX actions. This oversight allows authenticated users, including those with minimal privileges such as subscribers, to inject malformed data. Such actions can trigger unhandled errors on the admin panel, leading to a scenario where all administrators are locked out of the administration area. This results in a denial of service, significantly impacting site management and functionality for all users.

Affected Version(s)

Seraphinite Accelerator 0 < 2.29.24

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-2026-87828 - Proof of Concept

References

https://wpscan.com/vulnerability/ce546b34-4383-4166-9b87-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ángel PS (drtz)
WPScan
.