dbcve.org
Cross-site Scripting (XSS)Weakness · CWE-79

CVE-2026-6809

MEDIUM · 6.4 CVSS v3.1 Published 2026-04-28
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
70/100
Remediation priority · Elevated
Remotely reachable Zero-click

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 · unedited
The Social Post Embed plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Threads embed handler in all versions up to, and including, 2.0.1. This is due to insufficient input sanitization and output escaping on the user-supplied URL. 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 confidence

The Social Post Embed WordPress plugin fails to properly sanitize and escape user-supplied URLs in the Threads embed handler, allowing authenticated users with Contributor-level access or higher to inject malicious JavaScript via stored XSS. The vulnerable code does not sanitize input before storage or escape output when rendering embedded posts.

MitigationUpdate the plugin to version 2.0.2 or later. Until then, restrict contributor-level permissions and review existing posts for injected scripts.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS 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
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Confirm plugin installation
    Navigate to Plugins > Installed Plugins in WordPress admin and look for 'Social Post Embed' or check wp-content/plugins/ for a social-post-embed folder
    Affected if The plugin is installed and active
  2. Check installed plugin version
    In WordPress admin, go to Plugins > Installed Plugins and find the Social Post Embed plugin; the version number is displayed below the plugin name
    Affected if Version is lower than 2.0.2 or the version cannot be determined (indicating an unpatched version)
  3. Verify Threads embed usage
    Review posts/pages created by users with Contributor or higher permissions for any embed shortcodes or blocks related to Threads social media; check post content for [social-post-embed] or similar shortcodes containing threads.com URLs
    Affected if Threads embed functionality has been used in any published content
  4. Audit contributor-level user accounts
    Go to Users > All Users in WordPress admin and identify accounts with the Contributor role
    Affected if There are one or more users with Contributor-level access who could potentially exploit this vulnerability
  5. Inspect post content for unsanitized URLs
    Database query: SELECT ID, post_title, post_content FROM wp_posts WHERE post_content LIKE '%threads%' AND post_status = 'publish'; manually review the content for raw threads.com URLs that may contain script payloads
    Affected if Embedded Threads URLs in published posts contain unsanitized or unescaped JavaScript code

If the Social Post Embed plugin is installed with a version below 2.0.2 and Threads embeds have been created by users with Contributor or higher access, the environment is likely affected by this stored XSS vulnerability.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update the plugin to version 2.0.2 or later. Until then, restrict contributor-level permissions and review existing posts for injected scripts.

Recommended fix Moderate confidence

Social Post Embed version 2.0.2 or latest available version

  1. Log in to WordPress admin dashboard
  2. Navigate to Plugins > Installed Plugins
  3. Locate the Social Post Embed plugin
  4. Check if an update is available and update to the latest version, which should be version 2.0.2 or higher
  5. After updating, verify that the Threads embed functionality still works correctly

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2026-6809 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-6809 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

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.

What belongs here
  • 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