WordPress Theme My Login Password Reset Authentication Bypass

The Theme My Login plugin for WordPress is vulnerable to privilege escalation via account takeover in versions up to, and including, 7.2.1. This is due to the plugin not properly validating a user's identity prior to updating their password. This makes it possible for unauthenticated attackers to change arbitrary user's passwords on multi-site setups in certain configurations.

Casky was already ahead

This CVE exploits attack patterns that Casky's 224matched 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 Theme My Login plugin for WordPress versions up to 7.2.1 contains a critical privilege escalation vulnerability that allows unauthenticated attackers to reset arbitrary user passwords without proper identity verification. This flaw is particularly dangerous in WordPress multisite configurations where a single compromise can cascade across multiple sites. With a CVSS score of 9.8, this vulnerability represents a severe risk to WordPress administrators and organizations relying on this popular authentication plugin. An attacker exploiting this weakness gains immediate account takeover capabilities, potentially compromising high-privilege accounts like site administrators or super administrators, fundamentally breaking the authentication boundary that protects WordPress installations.

Casky.ai's 224 mapped security skills leverage Claude AI's extended reasoning to identify the attack patterns associated with CWE-269 (Improper Access Control) and MITRE ATT&CK technique TA0004 (Privilege Escalation). Practitioners using Casky would observe detections focused on suspicious password reset requests lacking proper authentication tokens, account modifications from non-standard origins, and anomalous account takeover patterns in WordPress logs. The platform's skills would correlate indicators such as unauthenticated POST requests to password reset endpoints, absence of nonce verification in request chains, and rapid successive login attempts following password changes. Security teams would see findings highlighting the specific validation gaps in the plugin's authentication workflow, enabling them to prioritize patching Theme My Login to version 7.2.2 or later and implement additional controls like Web Application Firewalls configured to enforce authentication requirements on sensitive endpoints.

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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 →

224 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-89079.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

identity access management · low

Run

MITRE ATT&CK Techniques

TA0004

Investigate the attack patterns behind CVE-2026-89079

Casky has 224 skills that investigate the attack patterns behind CVE-2026-89079. Run one and get CVSS-scored findings in 3 minutes.

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