Otter BlocksWordPress extension · Themeisle
CVE-2024-3343
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's block attributes in all versions up to, and including, 2.6.8 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Otter Blocks WordPress plugin fails to properly sanitize and escape user-supplied block attributes before output, allowing authenticated attackers with contributor-level or higher permissions to inject malicious JavaScript that executes in the browsers of users viewing affected pages.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Otter BlocksWordPress extension
< 2.6.9CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify Otter Blocks plugin is installedIn WordPress admin, go to Plugins > Installed Plugins and look for 'Otter Blocks' by Themeisle. Check if it is activated.Affected if The plugin is installed and activated
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Check the installed versionIn Plugins page, click on 'View Details' under Otter Blocks or check the plugin file header for version number. Compare against the affected range: versions < 2.6.9 are vulnerable.Affected if Installed version is lower than 2.6.9
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Identify user roles with contributor accessGo to Users > All Users and review roles. Contributors and users with higher permissions (Editor, Admin) can exploit this stored XSS vulnerability.Affected if Any authenticated user with contributor-level or higher permissions exists on the site
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Inspect content using Otter BlocksReview posts, pages, and custom post types that use Otter Blocks. Check the block editor for any blocks with custom attributes that might contain unsanitized user input.Affected if Otter Blocks with custom attribute values are present in published content
You are affected if Otter Blocks plugin version is below 2.6.9 and any contributor-level or higher user account exists on the WordPress site.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped2.6.9
Update to version 2.6.9 or later which contains the security fix; audit existing posts and pages for any injected malicious scripts and remove them.
2.6.9
- Backup your WordPress site before updating
- Log in to WordPress admin dashboard
- Navigate to Plugins > Installed Plugins
- Locate 'Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE' in the plugin list
- Click 'Update now' or manually update to version 2.6.9
- Verify the plugin is running version 2.6.9 or higher after update
- Test that the plugin functionality works correctly
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Otter Blocks
Scoped from the published advisory
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-3343 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-3343 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data