CVE-2026-115303
Contact Form by Supsystic < 1.11.1 - Unauthenticated CRLF / Email Header Injection via Reply-To Field Mapping
- State
- Published
- Severity
- 3.7 Low
- Published
- Oct 29, 2026
- Updated
- Oct 29, 2026
- Reserved
- Oct 22, 2026
Description
The Contact Form by Supsystic WordPress plugin before 1.11.1 does not strip CR/LF characters or re-validate submitted field values before concatenating them into outgoing email headers when a form is configured to map a submitted field into its Reply-To, From or Cc header, allowing unauthenticated users to inject arbitrary email headers such as additional Bcc or Cc recipients into the notification email.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.7 Low | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N | WPScan |
Weaknesses
- CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')
Affected Products
| Product | Versions |
|---|---|
Contact Form by SupsysticUnknown |
|
References
- https://wpscan.com/vulnerability/c32e3ccd-84cb-42a4-a343-353a02ccb541/exploitvdb-entrytechnical-description
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