Low severity · published Oct 29, 2026
CVE-2026-115303
Contact Form by Supsystic < 1.11.1 - Unauthenticated CRLF / Email Header Injection via Reply-To Field Mapping
New
3.7
CVSS
–
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CF
Contact Form by Supsystic ·
before 1.11.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-115303
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-115303
exploit
https://wpscan.com/vulnerability/c32e3ccd-84cb-42a4-a343-353a02ccb541/
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