Broken Access Control in WordPress Notification Master Plugin

Unauthenticated Broken Access Control in Notification Master – Real-Time WordPress Notifications With Email, SMS, Webhooks & More <= 1.7.1 versions.

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

CVE-2026-28153 exposes a critical broken access control vulnerability in the Notification Master WordPress plugin (versions <= 1.7.1), allowing unauthenticated attackers to bypass authorization checks and access sensitive notification functionality. This vulnerability matters because WordPress powers over 43% of all websites, and plugins extending core functionality like notifications often handle sensitive data including user communications, SMS delivery, webhooks, and email routing. Website administrators, e-commerce operators, and any organization relying on this plugin for customer notifications are directly affected, facing risks of unauthorized notification interception, message manipulation, and potential lateral movement into connected systems.

Casky's 283 mapped skills leverage Claude AI's extended reasoning to detect the attack patterns associated with TA0004 (Privilege Escalation) and TA0006 (Credential Access) that underpin this vulnerability. Practitioners using Casky would identify indicators including unauthenticated API endpoint access attempts, missing authorization validation checks in webhook handlers and notification dispatch functions, and anomalous cross-plugin communication patterns. The platform's skills would surface findings showing how attackers probe notification endpoints without authentication tokens, inspect HTTP requests lacking proper capability checks, and map the data flows from email/SMS handlers to backend systems—essentially visualizing how CWE-862 (Missing Authorization) manifests in real exploitation chains and what defensive controls should validate user permissions before any notification operation.

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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-2026-28153.

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 TA0006

Investigate the attack patterns behind CVE-2026-28153

Casky has 283 skills that investigate the attack patterns behind CVE-2026-28153. Run one and get CVSS-scored findings in 3 minutes.

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