---
id: "CVE-2026-109933"
kind: "vulnerability"
aliases: ["CVE-2026-109933"]
title: "Otter Blocks WordPress plugin: stored script injection through block styling values"
severity: "medium"
cvss: 6.8
epss: 0.00153
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "wordpress", "wordpress-plugins"]
not_affected_if: ["no-contributor-accounts", "plugin-3.2.8-or-later", "plugin-not-installed"]
published_at: "2026-10-23T06:17:05+00:00"
first_seen_at: "2026-10-23T21:57:32+00:00"
updated_at: "2026-10-25T03:42:40+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-109933", "first_seen_at": "2026-10-23T21:57:32+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-109933", "first_seen_at": "2026-10-24T07:15:51+00:00"}]
---

# Otter Blocks WordPress plugin: stored script injection through block styling values

The Otter Blocks WordPress plugin before 3.2.8 writes user-supplied block styling values into an inline stylesheet without sanitizing or escaping them. A contributor-level user can store a script that runs in the browser of any visitor, including administrators, when they view the affected post.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Otter Blocks version in the WordPress plugins screen or `wp plugin get otter-blocks --field=version`; versions below `3.2.8` are affected.
- Review posts by contributor-level accounts for inline styles containing script-like content, if the team has reason to suspect abuse.

## Fix

- Update the Otter Blocks plugin to `3.2.8` or later.
- Rotate credentials for any contributor or author accounts if abuse is suspected.

## Timeline

- 2026-10-23T21:57:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-109933
- 2026-10-24T07:15:51+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-109933

## From the sources

The Otter Blocks  WordPress plugin before 3.2.8 does not properly sanitize and escape user-supplied block styling values before writing them into an inline stylesheet, allowing users with contributor-level access and above to inject arbitrary web scripts that execute when any visitor, including administrators, views the affected post.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_