What is CVE-2025-13587?

CVE-2025-13587 is a medium-severity vulnerability in Ss88 Uk Two Factor (2fa) Authentication Via Email, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-02-19.

How severe is CVE-2025-13587?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Improper input validation in Ss88 Uk Two Factor (2fa) Authentication Via Email

CVE-2025-13587

The Two Factor (2FA) Authentication via Email plugin for WordPress is vulnerable to Two-Factor Authentication Bypass in versions up to, and including, 1.9.8. This is because the SS88_2FAVE::wp_login() method only enforces the 2FA requirement if the 'token' HTTP GET parameter is undefined, which makes it possible to bypass two-factor authentication by supplying any value in the 'token' parameter during login, including an empty one.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.004 (28.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Ss88_uk Two Factor (2fa) Authentication Via Email — versions 0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

Frequently asked questions

What is CVE-2025-13587?: CVE-2025-13587 is a medium-severity vulnerability in Ss88 Uk Two Factor (2fa) Authentication Via Email, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-02-19.
How severe is CVE-2025-13587?: Medium severity. CVSS v3 base score is 6.5 out of 10.