CVE-2026-14556CWE-116

CVE-2026-14556

Medium · published October 21, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
4.3
In the wild
Unconfirmed
What it is

The HappyForms WordPress plugin before 1.26.15 does not sanitise or escape a user-controlled referral value before embedding it in the form notification email, allowing unauthenticated attackers to inject arbitrary HTML into the emails site administrators receive.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00155 · 4.3th percentile
Weakness
CWE-116 · Improper Encoding or Escaping of Output
Published
2026-10-21T13:17Z
References (1)
https://wpscan.com/vulnerability/7673862c-b37c-4c7e-af3f-c32cbd2deb23/ · [email protected]
EPSS history
Timeline
  • 22 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 21 OCT 08:38Z
    HappyForms < 1.26.15 - Unauthenticated HTML Injection in Admin Notification Email via client_referer
    cvelistv5
  • 21 OCT 08:38Z
    HappyForms < 1.26.15 - Unauthenticated HTML Injection in Admin Notification Email via client_referer
    cvelistv5