Prenotazioni Plugin Stored XSS via Unprotected Settings

The Prenotazioni WordPress plugin through 1.7.5 does not have authorisation and CSRF checks when saving its settings, and does not escape some of them when outputting them, allowing unauthenticated users to perform Stored Cross-Site Scripting attacks against administrators and site visitors.

Casky was already ahead

This CVE exploits attack patterns that Casky's 323matched 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 Prenotazioni WordPress plugin through version 1.7.5 contains a critical stored cross-site scripting (XSS) vulnerability that allows unauthenticated attackers to inject malicious scripts into plugin settings. Because the plugin fails to implement proper authorization checks and CSRF protections when saving configuration parameters, and subsequently fails to escape output when displaying these settings, an attacker can craft a malicious request that persists JavaScript code in the WordPress database. This vulnerability affects any WordPress site running the vulnerable plugin version, impacting both administrators and site visitors who view pages containing the compromised settings. The ability to execute arbitrary code in the browser context of administrators makes this a high-severity threat suitable for session hijacking, credential theft, or further site compromise.

Casky's 323 mapped security skills leverage Claude AI's extended reasoning to detect the attack patterns underlying this vulnerability across MITRE ATT&CK techniques TA0001 (Reconnaissance) and TA0043 (Reconnaissance via social engineering and technical probing). Practitioners using Casky would identify detection signals including: unauthenticated POST requests to plugin settings endpoints without nonce validation (CWE-79 input validation failures), suspicious parameter values containing script tags or event handlers in HTTP requests, database queries storing unescaped user-supplied input in settings tables, and output rendering that fails to apply htmlspecialchars() or wp_kses_post() sanitization functions. The platform's skill mapping would flag the absence of capability checks (current_user_can() in WordPress contexts) and CSRF token validation as structural weaknesses, enabling practitioners to correlate these code-level indicators with behavioral exploitation attempts before malicious payloads reach production.

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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 →

323 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-103305.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

Run

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-103305

Casky has 323 skills that investigate the attack patterns behind CVE-2026-103305. Run one and get CVSS-scored findings in 3 minutes.

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