Stored XSS in W3 Total Cache Plugin Affects WordPress Sites

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Bold Grid W3 Total Cache w3-total-cache allows Stored XSS.This issue affects W3 Total Cache: from n/a through 2.10.7.

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

W3 Total Cache, a widely-used WordPress performance optimization plugin, contains a Stored Cross-Site Scripting (XSS) vulnerability that allows attackers to inject malicious JavaScript code into web pages viewed by site visitors. With a CVSS score of 7.1, this vulnerability is rated high severity because it affects versions through 2.10.7 and enables attackers to execute arbitrary scripts in the context of vulnerable websites. Site administrators, content editors, and any WordPress installation using the affected plugin versions are at risk of having their pages compromised, leading to potential credential theft, malware distribution, or defacement.

Casky's security skills leverage Claude AI's extended reasoning to correlate 323 detection patterns across MITRE ATT&CK techniques TA0001 (Initial Access) and TA0043 (Reconnaissance). Practitioners using Casky would identify attack chains where adversaries first perform reconnaissance on plugin versions (TA0043) before injecting malicious payloads through input fields that lack proper sanitization. The platform's skill set detects the hallmarks of stored XSS attacks: unvalidated user input flowing into database storage, lack of output encoding in rendered HTML, and patterns consistent with CWE-79 violations. Security teams would see findings highlighting compromised cache files, suspicious JavaScript injection points, and post-exploitation indicators where attackers leverage the trusted plugin context to establish persistence or pivot to other attack objectives.

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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-2026-114178.

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-2026-114178

Casky has 323 skills that investigate the attack patterns behind CVE-2026-114178. Run one and get CVSS-scored findings in 3 minutes.

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