Stored Cross-Site Scripting in Otter Blocks WordPress Plugin
CVE-2026-109936
Key Information:
- Vendor
WordPress
- Status
- Vendor
- CVE Published:
- 23 October 2026
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What is CVE-2026-109936?
The Otter Blocks plugin for WordPress, prior to version 3.2.8, is susceptible to a stored Cross-Site Scripting (XSS) vulnerability. This issue arises from improper bounding of a pattern utilized to rewrite dynamic-content tokens during block rendering. As a result, an attacker could inject unescaped data by manipulating HTML attributes, leading to the execution of malicious scripts in the browsers of users visiting the affected pages, including administrators. The flaw could be exploited by unauthenticated users, posing significant risks to website integrity and user safety.
Affected Version(s)
Otter Blocks 0 < 3.2.8
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.