XSS in Flatpress
CVE-2026-56785
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.004 (36.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.
Affected products
- Flatpress — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56785?
- CVE-2026-56785 is a high-severity vulnerability in Flatpress, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-06-23.
- How severe is CVE-2026-56785?
- High severity. CVSS v3 base score is 8.2 out of 10.