CVE-2026-14556 json
HappyForms < 1.26.15 - Unauthenticated HTML Injection in Admin Notification Email via client_referer
published 2026-10-21 19 d ago modified 2026-10-21 18 d ago also EUVD-2026-107147
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 10%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Unknown HappyForms 1.26.15
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 19 d ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/7673862c-b37c-4c7e-af3f-c32cbd2deb23/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
Affected products
- Unknown HappyForms
Classification
- Weakness
-
- CWE-116 Improper Encoding or Escaping of Output
- Technology feeds
References
-
wpscan.com
/vulnerability/7673862c-b37c-4c7e-af3f-c32cbd2deb23/
exploit, vdb-entry, technical-description
Sources
- CVE List CVE-2026-14556
- NVD CVE-2026-14556
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.