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CVE-2026-3228

MediumPublished

NextScripts: Social Networks Auto-Poster <= 4.4.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'nxs_fbembed' Shortcode

Published: Mar 10, 2026
Updated: Apr 8, 2026
Assigning CNA: Wordfence
Evidence observed: Aug 25, 2026

Primary CVSS

6.4/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

3.7%

Low · next 30 days

Percentile: 89.1%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The NextScripts: Social Networks Auto-Poster plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `[nxs_fbembed]` shortcode in all versions up to, and including, 4.4.6. This is due to insufficient input sanitization and output escaping on the `snapFB` post meta value. 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.

Sources

CVE-2026-3228Exploit
Scans and exploits CVE-2026-3228, a stored XSS in NextScripts WordPress plugin, with pre-auth detection, authenticated checks, and payload injection for PoC, cookie theft, or admin creation.

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