CVE-2026-13440Network attack vector

Unauthenticated script execution via exposed AJAX nonce

Published Jul 28, 2026 · Updated Jul 28, 2026

Stored XSS in weDevs StoreGrowth 2.1.0 and earlier allows remote attackers to inject scripts through the message_popup parameter. The create_popup AJAX handler stores message_popup without sufficient sanitization, while its only ajd_protected nonce is exposed to unauthenticated visitors through bogo_save_url.ajd_nonce. Injected scripts persist in popup settings and execute in visitors’ browsers when affected storefront content is viewed.

CVSS severity7.2
High
EPSS probability0.27%
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 weDevs StoreGrowth 2.1.0 and earlier allows remote attackers to inject scripts through the message_popup parameter. The create_popup AJAX handler stores message_popup without sufficient sanitization, while its only ajd_protected nonce is exposed to unauthenticated visitors through bogo_save_url.ajd_nonce. Injected scripts persist in popup settings and execute in visitors’ browsers when affected storefront content is viewed.

The record

CVE
CVE-2026-13440
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
HappyMonster
Product
StoreGrowth
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 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 <=2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HappyMonster · StoreGrowthversion=0 <=2.1.0

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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