CVE-2026-115303 Contact Form by Supsystic < 1.11.1 - Unauthenticated CRLF / Email Header Injection via Reply-To Field Mapping
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-115303?
CVE-2026-115303 is a low-severity vulnerability in Unknown Contact Form by Supsystic, published on 29 Oct 2026.
Official 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.
Weakness: CWE-93
Which versions are affected by CVE-2026-115303?
How do I fix CVE-2026-115303?
No fix has been published for CVE-2026-115303 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-115303 being exploited?
There is no known exploitation of CVE-2026-115303 in the wild and no public exploit code.
Sources
Also known as GHSA-ghmm-gqr3-xwc7.