CVE-2026-15385Public exploitNetwork attack vector

Subscriber-level stored XSS via unescaped style value

Published Aug 2, 2026 · Updated Aug 2, 2026

Stored XSS in ThemeWant RT Mega Menu before 1.5.2 allows remote authenticated users to execute JavaScript in visitors' browsers. The menu-settings AJAX action accepts a subscriber-supplied width value, and public navigation rendering writes it into a style attribute without escaping. Any logged-in subscriber can obtain the nonce; a visitor who hovers the altered menu runs the stored event handler, enabling session or site takeover.

CVSS severity5.4
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in ThemeWant RT Mega Menu before 1.5.2 allows remote authenticated users to execute JavaScript in visitors' browsers. The menu-settings AJAX action accepts a subscriber-supplied width value, and public navigation rendering writes it into a style attribute without escaping. Any logged-in subscriber can obtain the nonce; a visitor who hovers the altered menu runs the stored event handler, enabling session or site takeover.

The record

CVE
CVE-2026-15385
Published
Aug 2, 2026
Updated
Aug 2, 2026
Vendor
ThemeWant
Product
RT Mega Menu
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ThemeWant · RT Mega Menuversion=0 <1.5.2

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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