CVE-2026-4080Public exploitNetwork attack vector

Contributor-level stored XSS via unescaped shortcode attributes

Published Jun 2, 2026 · Updated Jun 2, 2026

Stored XSS in zeshanb Easy Cart 1.8 and earlier allows remote authenticated users to inject scripts through add_to_cart attributes. The ectp_add_to_cart() function sanitizes the attributes but inserts them into double-quoted HTML attributes without escaping quote characters. Contributor-level access is sufficient to persist an event handler in a page, which executes in the browser of each user who visits that page.

CVSS severity6.4
Medium
EPSS probability0.24%
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 zeshanb Easy Cart 1.8 and earlier allows remote authenticated users to inject scripts through add_to_cart attributes. The ectp_add_to_cart() function sanitizes the attributes but inserts them into double-quoted HTML attributes without escaping quote characters. Contributor-level access is sufficient to persist an event handler in a page, which executes in the browser of each user who visits that page.

The record

CVE
CVE-2026-4080
Published
Jun 2, 2026
Updated
Jun 2, 2026
Vendor
zeshanb
Product
Easy Cart
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 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 <=1.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

zeshanb · Easy Cartversion=0 <=1.8

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/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.

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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')
T1059.007JavaScript/JScript

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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