CVE-2026-96649 Cross-site scripting in Frontend Post Submission Manager Lite – Guest Post and Frontend Submission Forms
Unauthenticated attackers can inject arbitrary scripts via the post_content parameter in Frontend Post Submission Manager Lite, requiring guest post submission to be enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-96649?
CVE-2026-96649 is a high-severity cross-site scripting vulnerability in wpshuffle Frontend Post Submission Manager Lite – Guest Post and Frontend Submission Forms, published on 30 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Frontend Post Submission Manager Lite – Frontend Posting WordPress Plugin plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via post_content Parameter (data-label DOM Sink) in all versions up to, and including, 1.3.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the site operator to have enabled guest post submission via the [fpsm] shortcode, which registers a publicly accessible AJAX handler gated only by a nonce emitted on every page containing the shortcode.
Weakness: CWE-79
Which versions are affected by CVE-2026-96649?
How do I fix CVE-2026-96649?
No fix has been published for CVE-2026-96649 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-2026-96649 being exploited?
There is no known exploitation of CVE-2026-96649 in the wild and no public exploit code.
Sources
Also known as GHSA-6769-w4q7-57h5.