Authorization Flaw in Streamit WordPress Theme by Streamit Inc.
CVE-2026-13423

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Streamit
Vendor
CVE Published:
29 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13423?

The Streamit WordPress theme, up to version 4.5.0, has a significant security vulnerability that lacks proper authorization and nonce verification on certain AJAX routes. This weakness enables unauthenticated attackers to invoke arbitrary PHP functions using custom arguments, potentially allowing them to escalate privileges or execute remote code. Such exploits could facilitate the creation of unauthorized administrator accounts, compromising the integrity and security of WordPress installations utilizing this theme.

Affected Version(s)

Streamit 0 < 4.5.2

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-2026-13423 - Proof of Concept

References

https://wpscan.com/vulnerability/f85c5da1-412f-4079-8c44-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Erwan LR (WPScan)
WPScan
.