CVE-2026-86813

4.8 mediumEPSS 0.2%

Medium (4.8). EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

4.8 medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 15% of CVEs (scores of 2026-10-31)
CWE: CWE-93
Published: 2026-09-11
Modified: 2026-09-11
Record from: the NVD, synced 2026-10-19

References

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

Check your stack JSON