CVE-2026-3228 Cross-site scripting in NextScripts: Social Networks Auto-Poster
Authenticated attackers with Contributor access can inject arbitrary scripts via the nxs_fbembed shortcode, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3228?
CVE-2026-3228 is a medium-severity cross-site scripting vulnerability in NextScripts: Social Networks Auto-Poster, published on 10 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-3228?
How do I fix CVE-2026-3228?
No fix has been published for CVE-2026-3228 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-3228 being exploited?
There is no known exploitation of CVE-2026-3228 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-9m3v-p67j-5wcg.