WP 2FA Plugin Fails to Validate Second Authentication Factor

The WP 2FA WordPress plugin before 4.1.0 does not validate the second authentication factor when one of its supported methods is selected at login, allowing an attacker who already knows a user's password to bypass two-factor authentication and fully access the account, including administrator accounts.

Casky was already ahead

This CVE exploits attack patterns that Casky's 283matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

The WP 2FA WordPress plugin before version 4.1.0 contains a critical authentication bypass vulnerability (CWE-287) that completely undermines two-factor authentication security. When a user selects one of the plugin's supported 2FA methods during login, the plugin fails to properly validate the second authentication factor, allowing attackers who possess a user's password to gain full account access without completing the second factor challenge. This is particularly dangerous for WordPress sites where administrators use the plugin, as account takeover directly translates to site-wide compromise and potential malware deployment, data theft, or website defacement.

Casky's 283 mapped skills leverage Claude AI's extended reasoning to identify the attack patterns associated with this vulnerability across MITRE ATT&CK techniques TA0004 (Privilege Escalation) and TA0006 (Credential Access). Practitioners using Casky will detect suspicious login patterns where authentication succeeds despite 2FA bypass attempts, identify failed or missing 2FA validation logs in WordPress audit trails, and recognize credential reuse attempts that succeed without proper second-factor verification. The platform's skills enable detection of post-authentication anomalies—such as unexpected administrative actions or privilege escalation occurring immediately after logins lacking valid 2FA records—providing defenders with behavioral indicators that distinguish legitimate access from accounts compromised through this specific bypass technique.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

283 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-15372.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

cryptography · low

Run

MITRE ATT&CK Techniques

TA0004 TA0006

Investigate the attack patterns behind CVE-2026-15372

Casky has 283 skills that investigate the attack patterns behind CVE-2026-15372. Run one and get CVSS-scored findings in 3 minutes.

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