Unauthenticated Cross-Site Scripting in PICU

Unauthenticated Cross Site Scripting (XSS) in picu <= 3.10.1 versions.

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

CVE-2026-104395 represents a critical authentication bypass vulnerability affecting PICU versions 3.10.1 and earlier. This unauthenticated Cross-Site Scripting (XSS) flaw allows attackers to inject malicious scripts without requiring valid credentials, potentially compromising any user who visits a crafted malicious page. With a CVSS score of 7.1, this vulnerability poses significant risk to organizations deploying vulnerable PICU instances, enabling attackers to steal session tokens, perform unauthorized actions on behalf of users, or redirect traffic to phishing endpoints. The attack surface is particularly broad since no authentication is required, making this an attractive vector for opportunistic threat actors.

Casky.ai's 323 matched security skills leverage Claude AI's extended reasoning to detect the attack patterns underlying this CVE across MITRE ATT&CK's Initial Access (TA0001) and Resource Development (TA0043) phases. Practitioners using Casky will identify detection signals associated with suspicious script injection payloads in HTTP requests, unusual DOM manipulation patterns, and unauthorized session creation attempts. The platform maps these observations to specific attack techniques, helping security teams recognize exploitation attempts in real-time through behavioral analysis of network traffic and application logs. By correlating unauthenticated access attempts with XSS-specific indicators—such as JavaScript payload variations and browser-based reconnaissance activity—Casky enables practitioners to prioritize mitigation efforts and implement targeted defensive controls before attackers establish persistence.

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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-2026-104395.

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-2026-104395

Casky has 323 skills that investigate the attack patterns behind CVE-2026-104395. Run one and get CVSS-scored findings in 3 minutes.

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