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Description

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.

PUBLISHED Reserved 2026-04-21 | Published 2026-04-28 | Updated 2026-04-28 | Assigner Wordfence




MEDIUM: 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

Any version
affected

Timeline

2026-04-21:Vendor Notified
2026-04-27:Disclosed

Credits

Anas Mokhtari finder

References

www.wordfence.com/...-8878-4328-a5dc-113d213cca33?source=cve

plugins.trac.wordpress.org/...st-embed/trunk/inc/threads.php

plugins.trac.wordpress.org/...bed/tags/2.0.1/inc/threads.php

plugins.trac.wordpress.org/...bed/tags/2.0.2/inc/threads.php

plugins.trac.wordpress.org/...bed/tags/2.0.2/inc/threads.php

plugins.trac.wordpress.org/...bed/tags/2.0.2/inc/threads.php

cve.org (CVE-2026-6809)

nvd.nist.gov (CVE-2026-6809)

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