MEDIUM 4.8 NVD

CVE-2026-86813

The MetForm WordPress plugin before 4.1.9 does not properly neutralize newline characters in user-submitted values that are placed into notification email heade

The MetForm WordPress plugin before 4.1.9 does not properly neutralize newline characters in user-submitted values that are placed into notification email headers, allowing unauthenticated attackers to inject additional email headers, such as Bcc, into the emails the site sends when a submitted field value is configured to populate a header.

References

https://wpscan.com/vulnerability/afda2a26-b965-42cb-85a8-4a4d83ec026e/

Published: 2026-09-11 · Source: NVD · Feed updated: 2026-09-11

This medium severity vulnerability with a CVSS score of 4.8 was published on 2026-09-11 via NVD.

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