Vulnerability in Simple Basic Contact Form

CVE-2026-8172

The Simple Basic Contact Form WordPress plugin through 20250114 does not escape user-supplied input before reflecting it into the contact form output on validation errors, leading to a Reflected Cross-Site Scripting vulnerability that unauthenticated attackers can exploit against site visitors via a crafted link or cross-site form submission.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (17.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-8172: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Simple Basic Contact Form — versions 0

References

Frequently asked questions

What is CVE-2026-8172?
CVE-2026-8172 is a high-severity vulnerability in Simple Basic Contact Form, classified under CWE-79 CROSS-SITE SCRIPTING (XSS). CVSS score: 7.1/10. Published 2026-06-23.
How severe is CVE-2026-8172?
High severity. CVSS v3 base score is 7.1 out of 10.