CVE-2026-56785 FlatPress - Stored Cross-Site Scripting via Unescaped Comment and Contact Form Fields
Attackers can inject malicious scripts via comment and contact forms in FlatPress, potentially compromising administrator accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-56785?
CVE-2026-56785 is a high-severity cross-site scripting vulnerability in FlatPress, published on 23 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
FlatPress contains a stored cross-site scripting vulnerability in comment and contact forms where name, URL, and email fields are rendered without proper output encoding in Smarty templates. Attackers can inject arbitrary HTML and JavaScript through these fields to execute malicious scripts in browsers of viewers including administrators, or bypass URL scheme validation to inject javascript: or data: URIs.
Weakness: CWE-79
Which versions are affected by CVE-2026-56785?
How do I fix CVE-2026-56785?
No fix has been published for CVE-2026-56785 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-2026-56785 being exploited?
There is no known exploitation of CVE-2026-56785 in the wild and no public exploit code.
Sources
Also known as GHSA-gf5w-3f8w-9fm6.