CVE-2026-19857CWE-74

CVE-2026-19857

Medium · published September 16, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
8.0
In the wild
Unconfirmed
What it is

The Formidable Forms WordPress plugin before 6.35 does not prevent a request-derived value from reaching the WordPress shortcode parser when it substitutes a supported token into a form's custom HTML, allowing unauthenticated visitors to have arbitrary shortcodes, with attacker-chosen attributes, executed server-side on any page displaying an affected form.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00188 · 8.0th percentile
Weakness
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published
2026-09-16T11:16Z
References (1)
https://wpscan.com/vulnerability/5ff439f4-aa99-4198-b908-0cf098656cf7/ · [email protected]
EPSS history
Timeline
  • 17 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 16 SEP 06:30Z
    Formidable Forms < 6.35 - Unauthenticated Arbitrary Shortcode Execution via [entry_key] Custom HTML Token
    cvelistv5