CVE-2025-12718: Quick Contact Form <= 8.2.6 - Unauthenticated Open Mail Relay

Severity: medium (CVSS 5.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-17 · updated 2026-06-17
Weakness: CWE-20

Description

The Quick Contact Form plugin for WordPress is vulnerable to Open Mail Relay in all versions up to, and including, 8.2.6. This is due to the 'qcf_validate_form' AJAX endpoint allowing a user controlled parameter to set the 'from' email address. This makes it possible for unauthenticated attackers to send emails to arbitrary recipients utilizing the server. The information is limited to the contact form submission details.

Affected products

saadiqbal Quick Contact Form: through 8.2.6

References

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3433286%40quick-contact-form&new=3433286%40quick-contact-form&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/dc7ba538-a7ee-48c8-996c-b8db1934fdeb?source=cve

Get alerted when CVE-2025-12718 or the next vulnerability affects your stack